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82 vulnerabilities by free5gc
CVE-2026-42081 (GCVE-0-2026-42081)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:59 – Updated: 2026-05-27 17:56
VLAI
Title
free5GC: UE Security Capability bypass on NGAP PathSwitchRequest
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not verify the UE Security Capabilities received in NGAP PathSwitchRequest messages against its locally stored values, as mandated by 3GPP TS 33.501 §6.7.3.1. A malicious gNB can overwrite the AMF's stored UE security capabilities with arbitrary values, which are then propagated in PathSwitchRequest Acknowledge messages and subsequent Handover Request messages. This leads to persistent handover denial-of-service for affected UEs. This vulnerability is fixed in 4.2.2.
Severity
6.1 (Medium)
CWE
- CWE-358 - Improperly Implemented Security Check for Standard
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-42082 (GCVE-0-2026-42082)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:59 – Updated: 2026-05-28 14:47
VLAI
Title
free5GC: Missing Concurrent NAS SMC Validation During NGAP Handover
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. The AMF does not check for ongoing N2 handover procedures before initiating a NAS Security Mode Command, and vice versa. This can lead to mismatches between NAS and AS security contexts in the network and the UE. This vulnerability is fixed in 4.2.2.
Severity
CWE
- CWE-358 - Improperly Implemented Security Check for Standard
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-42083 (GCVE-0-2026-42083)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:56 – Updated: 2026-05-27 17:47
VLAI
Title
free5GC: PCF Npcf_SMPolicyControl missing authentication middleware allows unauthenticated access to SM policy handlers and disclosure of subscriber SUPI
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, PCF Npcf_SMPolicyControl missing authentication middleware allows unauthenticated access to SM policy handlers and disclosure of subscriber SUPI. In NewServer(), the smPolicyGroup route group is created and routes are applied without attaching the router authorization middleware. In contrast, other PCF service groups such as Npcf_PolicyAuthorization do attach RouterAuthorizationCheck before route registration. Because the middleware is missing, requests to the /npcf-smpolicycontrol/v1/sm-policies, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/update, and /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/delete endpoints can reach business logic even when no valid OAuth token is provided. This vulnerability is fixed in 4.2.2.
Severity
8.2 (High)
CWE
- CWE-862 - Missing Authorization
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/844 | x_refsource_MISC |
| https://github.com/free5gc/pcf/pull/63 | x_refsource_MISC |
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CVE-2026-42459 (GCVE-0-2026-42459)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:53 – Updated: 2026-05-28 14:14
VLAI
Title
free5GC: Improper Input Validation and Generation of Error Message Containing Sensitive Information in github.com/free5gc/udm
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the free5GC UDM component fails to validate the supi path parameter in six GET handlers of the nudm-sdm (Subscriber Data Management) service. An unauthenticated attacker can inject control characters into the SUPI parameter, causing UDM to forward a malformed request to UDR and return a 500 Internal Server Error response that exposes internal infrastructure details. This vulnerability is fixed in 4.2.2.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-44315 (GCVE-0-2026-44315)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:52 – Updated: 2026-05-27 17:22
VLAI
Title
free5GC: NEF 3gpp-pfd-management API is unauthenticated; forged bearer tokens can create, read, and delete PFD transactions
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the 3gpp-pfd-management API without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can create, read, and delete PFD-management transaction state with a forged or arbitrary bearer token (e.g. Authorization: Bearer not-a-real-token). The route group is also reachable even when the running config's ServiceList does not declare it, so operators who think they disabled the service via config are still exposed. This vulnerability is fixed in 4.2.2.
Severity
9.4 (Critical)
CWE
- CWE-862 - Missing Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/858 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/23 | x_refsource_MISC |
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CVE-2026-44316 (GCVE-0-2026-44316)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:52 – Updated: 2026-05-27 17:54
VLAI
Title
free5GC: PCF npcf-smpolicycontrol POST /sm-policies panics on downstream UDR/OpenAPI 404 via nil pointer dereference
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-smpolicycontrol/v1/sm-policies handler (HandleCreateSmPolicyRequest) panics with a nil-pointer dereference when a downstream OpenAPI consumer call (UDR lookup) returns 404 Not Found and the consumer wrapper returns err != nil together with a nil response struct. The handler logs the OpenAPI error and continues executing instead of returning, then dereferences the nil response struct on a subsequent line and panics. Gin recovery converts the panic into HTTP 500, so a single attacker-shaped POST returns 500 instead of a clean 4xx whenever the downstream lookup fails. The PCF process keeps running. The trigger is a single POST containing input that causes the downstream UDR lookup to fail (e.g. an unknown DNN). In 4.2.1 this endpoint is also reachable WITHOUT an Authorization header because the PCF Npcf_SMPolicyControl route group is mounted without inbound auth middleware. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/803 | x_refsource_MISC |
| https://github.com/free5gc/pcf/pull/62 | x_refsource_MISC |
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CVE-2026-44317 (GCVE-0-2026-44317)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:50 – Updated: 2026-05-28 14:46
VLAI
Title
free5GC: PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing AfRoutReq via nil pointer dereference
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose ascReqData.suppFeat == "1" (enabling traffic-routing feature negotiation) and whose medComponents entries supply an afAppId but NO AfRoutReq. The create path then calls provisioningOfTrafficRoutingInfo(smPolicy, appID, routeReq, ...) with routeReq == nil and dereferences routeReq.RouteToLocs (and other fields) without a nil check, causing runtime error: invalid memory address or nil pointer dereference. Gin recovery converts the panic into HTTP 500. This vulnerability is fixed in 4.2.2.
Severity
6.5 (Medium)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/879 | x_refsource_MISC |
| https://github.com/free5gc/pcf/pull/65 | x_refsource_MISC |
| https://github.com/free5gc/pcf/commit/508d70b8527… | x_refsource_MISC |
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CVE-2026-44319 (GCVE-0-2026-44319)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:49 – Updated: 2026-05-28 14:15
VLAI
Title
free5GC: NEF crashes via logger.Fatal on PFD notification delivery failure (attacker-controlled notifyUri)
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF terminates the entire process when a stored PFD-subscription notifyUri cannot be reached. In PfdChangeNotifier.FlushNotifications(), the notifier calls NnefPFDmanagementNotify(...) and on any delivery error invokes logger.PFDManageLog.Fatal(err), which is os.Exit(1)-equivalent in Go. An attacker who can create a PFD subscription with an attacker-chosen notifyUri and then trigger a PFD change can deterministically kill NEF on the asynchronous delivery attempt -- the process exits with status 1, dropping NEF's entire SBI surface until restart. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/924 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/25 | x_refsource_MISC |
| https://github.com/free5gc/nef/commit/f110517b118… | x_refsource_MISC |
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CVE-2026-44320 (GCVE-0-2026-44320)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:48 – Updated: 2026-05-27 17:44
VLAI
Title
free5GC: NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-callback route group without inbound OAuth2/bearer-token authorization. A forged or arbitrary bearer token (e.g. Authorization: Bearer not-a-real-token) is enough to reach the SMF-callback handler -- the callback body is parsed and dispatched into NEF business logic instead of being rejected at the auth boundary. Same root cause as the other NEF SBI findings: the route group is mounted without any inbound auth middleware. NEF does not authenticate the producer NF identity before processing callback content; if an attacker can guess or obtain a valid NotifId, this missing auth boundary lets forged callbacks act on real subscription state. The route group is also reachable even when the runtime ServiceList does not declare it (it lists only nnef-pfdmanagement and nnef-oam). This vulnerability is fixed in 4.2.2.
Severity
7.3 (High)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/860 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/24 | x_refsource_MISC |
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CVE-2026-44321 (GCVE-0-2026-44321)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:47 – Updated: 2026-05-27 17:53
VLAI
Title
free5GC: SMF UPI POST /upi/v1/upNodesLinks exits the SMF process on overlapping UE pools (unauthenticated, reachable Fatalf)
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. The POST /upi/v1/upNodesLinks create-or-update handler accepts attacker-controlled JSON and passes it directly into UpNodesFromConfiguration(), which calls logger.InitLog.Fatalf(...) on several validation failures. One confirmed path is the UE-IP-pool overlap check: a single unauthenticated POST that adds a new UPF whose pool overlaps an existing UPF terminates the entire SMF process (docker ps shows Exited (1)), not just the goroutine. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/906 | x_refsource_MISC |
| https://github.com/free5gc/smf/pull/203 | x_refsource_MISC |
| https://github.com/free5gc/smf/commit/e0974e07dda… | x_refsource_MISC |
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CVE-2026-44322 (GCVE-0-2026-44322)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:46 – Updated: 2026-05-28 14:42
VLAI
Title
free5GC: NEF 3gpp-pfd-management PATCH applications/{appId} panics on UDR access failure due to nil ProblemDetails dereference
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF PATCH /3gpp-pfd-management/v1/{afId}/transactions/{transId}/applications/{appId} handler panics with a nil-pointer dereference when the upstream UDR call fails AND the consumer wrapper returns err != nil together with a nil *ProblemDetails. The handler's errPfdData != nil branch builds its own problemDetailsErr correctly, but immediately after it reads problemDetails.Cause (the OTHER value, which is nil in this branch) and panics. Gin recovery converts the panic into HTTP 500, so a single PATCH against this endpoint returns 500 instead of the intended controlled error response whenever UDR access is failing. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/925 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/22 | x_refsource_MISC |
| https://github.com/free5gc/nef/commit/72a47f3fab4… | x_refsource_MISC |
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CVE-2026-44323 (GCVE-0-2026-44323)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:45 – Updated: 2026-05-27 15:45
VLAI
Title
free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exists (nil pointer dereference)
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.
Severity
4.3 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/919 | x_refsource_MISC |
| https://github.com/free5gc/udr/pull/60 | x_refsource_MISC |
| https://github.com/free5gc/udr/commit/8a1d3c63be9… | x_refsource_MISC |
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CVE-2026-44324 (GCVE-0-2026-44324)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:44 – Updated: 2026-05-28 14:38
VLAI
Title
free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface type assertion (single authenticated request)
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler panics on a single authenticated request against a fresh UDR instance when the supplied ueId does not exist in UESubsCollection. The processor checks value, ok := udrSelf.UESubsCollection.Load(ueId) and sets a 404 USER_NOT_FOUND problem-details on the miss path, but execution continues and immediately runs value.(*udr_context.UESubsData) -- a Go type assertion on a nil interface, which panics with interface conversion: interface {} is nil, not *context.UESubsData. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.
Severity
6.5 (Medium)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
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CVE-2026-44325 (GCVE-0-2026-44325)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:43 – Updated: 2026-05-27 17:50
VLAI
Title
free5GC: NRF POST /oauth2/token structured-form parser type-confusion panic family (Reflect.Set on incompatible types)
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NRF root SBI endpoint POST /oauth2/token contains a parser-level type-confusion bug family. The handler in NFs/nrf/internal/sbi/api_accesstoken.go reflects over models.NrfAccessTokenAccessTokenReq, special-cases only plain string and NrfNfManagementNfType fields, and treats every other field as if it were a single models.PlmnId. The parsed *models.PlmnId is then assigned with reflect.Value.Set() to whichever field name the attacker put in the form body, which panics whenever the destination field's real type is incompatible (slice, different struct, primitive). Gin recovery converts each panic into HTTP 500, but the endpoint remains remotely panicable from a single unauthenticated form-encoded request and is repeatedly triggerable. This vulnerability is fixed in 4.2.2.
Severity
7.5 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/918 | x_refsource_MISC |
| https://github.com/free5gc/nrf/pull/83 | x_refsource_MISC |
| https://github.com/free5gc/nrf/commit/f7bc77daa74… | x_refsource_MISC |
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CVE-2026-44326 (GCVE-0-2026-44326)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:41 – Updated: 2026-05-27 17:53
VLAI
Title
free5GC: NEF 3gpp-traffic-influence API is unauthenticated; missing or forged bearer tokens can create, read, patch, and delete subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the 3gpp-traffic-influence API without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can create, read, patch, and delete traffic-influence subscriptions either with no Authorization header at all, or with a forged bearer token (e.g. Authorization: Bearer not-a-real-token). This includes creating AnyUeInd=true subscriptions intended to affect group / any-UE traffic steering. The route group is also reachable even when the running config's ServiceList does not declare it, so operators who think they disabled the service via config are still exposed. This vulnerability is fixed in 4.2.2.
Severity
9.4 (Critical)
CWE
- CWE-862 - Missing Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/859 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/23 | x_refsource_MISC |
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CVE-2026-44327 (GCVE-0-2026-44327)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:40 – Updated: 2026-05-28 14:40
VLAI
Title
free5GC: NEF nnef-oam route group is unauthenticated; no-token requests reach the OAM handler
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-oam route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can hit the OAM route with no Authorization header at all and the handler returns 200 OK. The current OAM handler is a stub that returns null, but the structural defect is route-group-scoped: the entire OAM route group has no inbound auth middleware, so every future OAM operation added to this group inherits the missing auth boundary by default. This vulnerability is fixed in 4.2.2.
Severity
10 (Critical)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/861 | x_refsource_MISC |
| https://github.com/free5gc/nef/pull/23 | x_refsource_MISC |
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CVE-2026-44328 (GCVE-0-2026-44328)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:39 – Updated: 2026-05-27 17:42
VLAI
Title
free5GC: SMF UPI DELETE /upi/v1/upNodesLinks/{ref} panics on AN-node deletion via nil UPF dereference; unauthenticated, state-mutating
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. On top of that, the DELETE /upi/v1/upNodesLinks/{upNodeRef} handler unconditionally dereferences upNode.UPF after the type-guarded async release, even though AN-typed nodes are constructed without a UPF object. As a result, a single unauthenticated DELETE /upi/v1/upNodesLinks/gNB1 request crashes the handler with a nil-pointer panic AND mutates the in-memory user-plane topology before panicking (the UpNodeDelete(upNodeRef) line runs first). This is an unauthenticated, state-mutating panic-DoS sink that an off-path network attacker can trigger by name against any AN entry. This vulnerability is fixed in 4.2.2.
Severity
8.2 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/905 | x_refsource_MISC |
| https://github.com/free5gc/smf/pull/199 | x_refsource_MISC |
| https://github.com/free5gc/smf/commit/b57bc48081c… | x_refsource_MISC |
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CVE-2026-44329 (GCVE-0-2026-44329)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:38 – Updated: 2026-05-28 15:00
VLAI
Title
free5GC: SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without OAuth2/bearer-token authorization middleware. A network attacker who can reach SMF on the SBI can hit UPI endpoints with no Authorization header at all, and the requests reach the SMF business handlers. In the running Docker lab this was directly demonstrated for read (GET /upi/v1/upNodesLinks), write (POST /upi/v1/upNodesLinks with attacker-controlled UP-node and link payload), and delete (DELETE /upi/v1/upNodesLinks/{nodeID}) operations. This vulnerability is fixed in 4.2.2.
Severity
10 (Critical)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/887 | x_refsource_MISC |
| https://github.com/free5gc/smf/pull/197 | x_refsource_MISC |
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CVE-2026-44330 (GCVE-0-2026-44330)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:36 – Updated: 2026-05-27 18:47
VLAI
Title
free5GC: NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-pfdmanagement route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can use a forged or arbitrary bearer token (e.g. Authorization: Bearer not-a-real-token) to read PFD application data via GET /applications and GET /applications/{appID}, and to create or delete PFD change-notification subscriptions via POST /subscriptions and DELETE /subscriptions/{subID}. Same root cause as the other NEF SBI findings: the route group is mounted without any inbound auth middleware. Unlike the OAM and traffic-influence groups, nnef-pfdmanagement IS declared in the runtime ServiceList, so this is the production-intended path that operators expect to be protected by OAuth2 setting receive from NRF: true -- and it is not. This vulnerability is fixed in 4.2.2.
Severity
10 (Critical)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-44318 (GCVE-0-2026-44318)
Vulnerability from cvelistv5 – Published: 2026-05-27 15:35 – Updated: 2026-05-27 17:35
VLAI
Title
free5GC: BSF concurrent PUT /nbsf-management/v1/subscriptions/{subId} crashes the BSF process via concurrent map read/write on Subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's BSF PUT /nbsf-management/v1/subscriptions/{subId} handler has an unsynchronized write on the global Subscriptions map. The handler first reads the map under RLock() via BSFContext.GetSubscription(subId), but if the subscription does not exist, ReplaceIndividualSubcription() writes back to the same map directly without taking the mutex (bsfContext.BsfSelf.Subscriptions[subId] = subscription). Under concurrent authenticated PUT load, one goroutine can read while another writes the map, which causes the Go runtime to abort the process with fatal error: concurrent map read and map write (Go runtime panics that come from concurrent map access bypass recover() and terminate the process). The BSF container exits with code 2 -- the entire BSF SBI surface goes down until restart. This vulnerability is fixed in 4.2.2.
Severity
6.5 (Medium)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/free5gc/issues/926 | x_refsource_MISC |
| https://github.com/free5gc/bsf/pull/7 | x_refsource_MISC |
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CVE-2026-41136 (GCVE-0-2026-41136)
Vulnerability from cvelistv5 – Published: 2026-04-21 23:54 – Updated: 2026-04-22 13:11
VLAI
Title
free5GC AMF missing default case in Content-Type switch in HTTPUEContextTransfer
Summary
free5GC AMF provides Access & Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the `HTTPUEContextTransfer` handler in `internal/sbi/api_communication.go` does not include a `default` case in the `Content-Type` switch statement. When a request arrives with an unsupported `Content-Type`, the deserialization step is silently skipped, `err` remains `nil`, and the processor is invoked with a completely uninitialized `UeContextTransferRequest` object. Version 1.4.3 contains a fix.
Severity
CWE
- CWE-440 - Expected Behavior Violation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/amf/releases/tag/v1.4.3 | x_refsource_MISC |
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CVE-2026-41135 (GCVE-0-2026-41135)
Vulnerability from cvelistv5 – Published: 2026-04-21 23:49 – Updated: 2026-04-22 14:19
VLAI
Title
free5GC PCF: Memory Leak via CORS Middleware Registration in HTTP Handler Leads to Denial of Service
Summary
free5GC UDR is the Policy Control Function (PCF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. A memory leak vulnerability in versions prior to 1.4.3 allows any unauthenticated attacker with network access to the PCF SBI interface to cause uncontrolled memory growth by sending repeated HTTP requests to the OAM endpoint. The root cause is a `router.Use()` call inside an HTTP handler that registers a new CORS middleware on every incoming request, permanently growing the Gin router's handler chain. This leads to progressive memory exhaustion and eventual Denial of Service of the PCF, preventing all UEs from obtaining AM and SM policies and blocking 5G session establishment. Version 1.4.3 contains a patch.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
| https://github.com/free5gc/pcf/commit/599803b1b2e… | x_refsource_MISC |
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CVE-2026-40343 (GCVE-0-2026-40343)
Vulnerability from cvelistv5 – Published: 2026-04-21 23:47 – Updated: 2026-04-22 13:12
VLAI
Title
free5GC UDR: Fail-open handling in PolicyDataSubsToNotifyPost allows unintended subscription creation
Summary
free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.2, a fail-open request handling flaw in the UDR service causes the `/nudr-dr/v2/policy-data/subs-to-notify` POST handler to continue processing requests even after request body retrieval or deserialization errors. This may allow unintended creation of Policy Data notification subscriptions with invalid, empty, or partially processed input, depending on downstream processor behavior. As of time of publication, a patched version is not available.
Severity
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-40249 (GCVE-0-2026-40249)
Vulnerability from cvelistv5 – Published: 2026-04-16 21:59 – Updated: 2026-04-18 02:47
VLAI
Title
free5gc UDR fail-open request handling in PolicyDataSubsToNotifySubsIdPut may allow unintended subscription updates after input errors
Summary
free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the PUT handler for updating Policy Data notification subscriptions at /nudr-dr/v2/policy-data/subs-to-notify/{subsId} does not return after request body retrieval or deserialization errors. Although HTTP 500 or 400 error responses are sent, execution continues and the processor is invoked with a potentially uninitialized or partially initialized PolicyDataSubscription object. This fail-open behavior may allow unintended modification of existing Policy Data notification subscriptions with invalid or empty input, depending on downstream processor and storage behavior. A patched version was not available at the time of publication.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-40248 (GCVE-0-2026-40248)
Vulnerability from cvelistv5 – Published: 2026-04-16 21:57 – Updated: 2026-04-20 15:00
VLAI
Title
free5gc UDR improper path validation allows unauthenticated creation and modification of Traffic Influence Subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the handler for creating or updating Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription is created or overwritten regardless. An unauthenticated attacker with access to the 5G Service Based Interface can create or overwrite arbitrary Traffic Influence Subscriptions, including injecting attacker-controlled notificationUri values and arbitrary SUPIs, by supplying any value for the influenceId path segment. A patched version was not available at the time of publication.
Severity
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-40247 (GCVE-0-2026-40247)
Vulnerability from cvelistv5 – Published: 2026-04-16 21:54 – Updated: 2026-04-17 18:44
VLAI
Title
free5gc UDR improper path validation allows unauthenticated access to Traffic Influence Subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the handler for reading Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription data is returned alongside the 404 response. An unauthenticated attacker with access to the 5G Service Based Interface can read arbitrary Traffic Influence Subscriptions, including SUPIs/IMSIs, DNNs, S-NSSAIs, and callback URIs, by supplying any value for the influenceId path segment. A patched version was not available at the time of publication.
Severity
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-40246 (GCVE-0-2026-40246)
Vulnerability from cvelistv5 – Published: 2026-04-16 21:40 – Updated: 2026-04-18 02:46
VLAI
Title
free5gc UDR improper path validation allows unauthenticated deletion of Traffic Influence Subscriptions
Summary
free5GC is an open-source implementation of the 5G core network. In versions 1.4.2 and below of the UDR service, the handler for deleting Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription is deleted regardless. An unauthenticated attacker with access to the 5G Service Based Interface can delete arbitrary Traffic Influence Subscriptions by supplying any value for the influenceId path segment, while the API misleadingly returns a 404 Not Found response. A patched version was not available at the time of publication.
Severity
CWE
- CWE-285 - Improper Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-40245 (GCVE-0-2026-40245)
Vulnerability from cvelistv5 – Published: 2026-04-15 23:25 – Updated: 2026-04-16 12:04
VLAI
Title
Free5GC: UDR nudr-dr influenceData/subs-to-notify leaks SUPI in error response body without authentication
Summary
Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions 4.2.1 and below contain an information disclosure vulnerability in the UDR (Unified Data Repository) service. The handler for GET /nudr-dr/v2/application-data/influenceData/subs-to-notify sends an HTTP 400 error response when required query parameters are missing but does not return afterward. Execution continues into the processor function, which queries the data repository and appends the full list of Traffic Influence Subscriptions, including SUPI/IMSI values, to the response body. An unauthenticated attacker with network access to the 5G Service Based Interface can retrieve stored subscriber identifiers with a single parameterless HTTP GET request. The SUPI is the most sensitive subscriber identifier in 5G networks, and its exposure undermines the privacy guarantees of the 3GPP SUCI concealment mechanism at the core network level. A similar bypass exists when sending a malformed snssai parameter due to the same missing return pattern.
Severity
7.5 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/free5gc/free5gc/security/advis… | x_refsource_CONFIRM |
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CVE-2026-5360 (GCVE-0-2026-5360)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:00 – Updated: 2026-04-03 19:59 X_Open Source
VLAI
Title
Free5GC aper type confusion
Summary
A vulnerability has been found in Free5GC 4.2.0. The affected element is an unknown function of the component aper. Such manipulation leads to type confusion. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been disclosed to the public and may be used. The name of the patch is 26205eb01705754b7b902ad6c4b613c96c881e29. It is best practice to apply a patch to resolve this issue.
Severity
CWE
- CWE-843 - Type Confusion
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354735 | vdb-entry |
| https://vuldb.com/vuln/354735/cti | signaturepermissions-required |
| https://vuldb.com/submit/781573 | third-party-advisory |
| https://github.com/free5gc/free5gc/issues/831 | issue-tracking |
| https://github.com/free5gc/aper/pull/11 | issue-trackingpatch |
| https://github.com/free5gc/free5gc/issues/831#iss… | exploitissue-tracking |
| https://github.com/free5gc/aper/commit/26205eb017… | patch |
| https://github.com/free5gc/free5gc/ | product |
Impacted products
Credits
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"name": "VDB-354735 | CTI Indicators (IOB, IOC)",
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"url": "https://github.com/free5gc/aper/pull/11"
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"url": "https://github.com/free5gc/free5gc/issues/831#issue-3996453112"
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"time": "2026-04-01T00:00:00.000Z",
"value": "Advisory disclosed"
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"lang": "en",
"time": "2026-04-01T19:21:22.000Z",
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"datePublished": "2026-04-02T17:00:19.072Z",
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CVE-2026-30653 (GCVE-0-2026-30653)
Vulnerability from cvelistv5 – Published: 2026-03-24 00:00 – Updated: 2026-03-24 18:51
VLAI
Summary
An issue in Free5GC v.4.2.0 and before allows a remote attacker to cause a denial of service via the function HandleAuthenticationFailure of the component AMF
Severity
7.5 (High)
CWE
- n/a
Assigner
References
1 reference
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