Vulnerability-Lookup

OPENSUSE-SU-2026:21898-1

Vulnerability from csaf_opensuse - Published: 2026-09-21 12:26 - Updated: 2026-09-24 17:48

Summary

Security update for distribution

Severity

Important

Notes

Title of the patch: Security update for distribution

Description of the patch: This update for distribution fixes the following issues: - CVE-2026-37236: github.com/grpc-ecosystem/grpc-gateway/v2/runtime: client can override the HTTP method of a POST request through the X-HTTP-Method-Override header and bypass established access control (bsc#1277966). - CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs (bsc#1276677). - CVE-2026-84303: github.com/grpc/grpc-go: xDS RBAC HTTP filter implementation issue allows for bypass of authorization policies via mixed-case or canonical-case header matches (bsc#1279316). - CVE-2026-84304: github.com/grpc/grpc-go: heap memory exhaustion via HTTP/2 DATA frame fragmentation (bsc#1279219). - CVE-2026-84445: google.golang.org/grpc: DoS via crash due to missing `:authority` and `Host` headers in gRPC-Go xDS servers (bsc#1278997). - CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs (bsc#1276677). - CVE-2026-84303: google.golang.org/grpc: xDS RBAC HTTP filter implementation issue allows for bypass of authorization policies via mixed-case or canonical-case header matches (bsc#1279316). - CVE-2026-84304: google.golang.org/grpc: heap memory exhaustion via HTTP/2 DATA frame fragmentation (bsc#1279219). - CVE-2026-84445: google.golang.org/grpc: DoS via crash due to missing ':authority' and 'Host' headers in gRPC-Go xDS servers (bsc#1278997).

Patchnames: openSUSE-Leap-16.0-1726

CVE-2026-37236

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:distribution-registry-0:3.1.1-160000.3.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:distribution-registry-0:3.1.1-160000.3.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:distribution-registry-0:3.1.1-160000.3.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:distribution-registry-0:3.1.1-160000.3.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-39827

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products, the same list as for CVE-2026-37236

Threats

Impact important

CVE-2026-41178

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

Recommended 4 products, the same list as for CVE-2026-37236

Threats

Impact moderate

CVE-2026-84303

9.1 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Recommended 4 products, the same list as for CVE-2026-37236

Threats

Impact critical

CVE-2026-84304

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products, the same list as for CVE-2026-37236

Threats

Impact important

CVE-2026-84445

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products, the same list as for CVE-2026-37236

Threats

Impact important

References

30 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1268884	self
https://bugzilla.suse.com/1276677	self
https://bugzilla.suse.com/1277966	self
https://bugzilla.suse.com/1278997	self
https://bugzilla.suse.com/1279219	self
https://bugzilla.suse.com/1279316	self
https://www.suse.com/security/cve/CVE-2026-37236/	self
https://www.suse.com/security/cve/CVE-2026-39827/	self
https://www.suse.com/security/cve/CVE-2026-41178/	self
https://www.suse.com/security/cve/CVE-2026-84303/	self
https://www.suse.com/security/cve/CVE-2026-84304/	self
https://www.suse.com/security/cve/CVE-2026-84445/	self
https://www.suse.com/security/cve/CVE-2026-37236	external
https://bugzilla.suse.com/1277941	external
https://www.suse.com/security/cve/CVE-2026-39827	external
https://bugzilla.suse.com/1266049	external
https://www.suse.com/security/cve/CVE-2026-41178	external
https://bugzilla.suse.com/1276509	external
https://www.suse.com/security/cve/CVE-2026-84303	external
https://bugzilla.suse.com/1278268	external
https://bugzilla.suse.com/1280553	external
https://www.suse.com/security/cve/CVE-2026-84304	external
https://bugzilla.suse.com/1278271	external
https://bugzilla.suse.com/1280553	external
https://www.suse.com/security/cve/CVE-2026-84445	external
https://bugzilla.suse.com/1278687	external
https://bugzilla.suse.com/1280553	external
https://bugzilla.suse.com/1280617	external

JSON

To clipboard

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          "text": "grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.",
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          "text": "An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection\u0027s internal state and released for garbage collection.",
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CVE-2026-37236 (GCVE-0-2026-37236)

Vulnerability from cvelistv5 – Published: 2026-08-28 00:00 – Updated: 2026-09-02 18:14

Summary

grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 18:14 UTC

CWE

n/a
CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

mitre mitre root

References

3 references

URL	Tags
https://github.com/grpc-ecosystem/grpc-gateway/co…
https://github.com/grpc-ecosystem/grpc-gateway
https://s00me00ne.com/cve/cve-2026-37236/

Show details on NVD website

JSON

To clipboard

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CVE-2026-39827 (GCVE-0-2026-39827)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:35

Title

Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

Summary

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-22 18:35 UTC

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

Go Google root

References

4 references

URL	Tags
https://go.dev/issue/35127
https://go.dev/cl/781320
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5016

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

Ziyan Zhou

Show details on NVD website

JSON

To clipboard

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              "description": "CWE-401: Missing Release of Memory after Effective Lifetime",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.064Z",
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        "shortName": "Go"
      },
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          "url": "https://go.dev/issue/35127"
        },
        {
          "url": "https://go.dev/cl/781320"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5016"
        }
      ],
      "title": "Invoking  memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh"
    }
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    "dateReserved": "2026-04-07T18:13:03.528Z",
    "dateUpdated": "2026-05-22T18:35:40.472Z",
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  },
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CVE-2026-41178 (GCVE-0-2026-41178)

Vulnerability from cvelistv5 – Published: 2026-06-04 14:38 – Updated: 2026-06-04 15:46

Title

OpenTelemetry-Go's baggage parsing no longer caps raw header length

Summary

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-04 15:46 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_CONFIRM
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version
open-telemetry	go.opentelemetry.io/otel/baggage	Affected: = 1.41.0 Affected: = 1.43.0
open-telemetry	go.opentelemetry.io/otel/propagation	Affected: = 1.41.0 Affected: = 1.43.0

Show details on NVD website

JSON

To clipboard

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  "containers": {
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CVE-2026-84303 (GCVE-0-2026-84303)

Vulnerability from cvelistv5 – Published: 2026-09-01 18:14 – Updated: 2026-09-02 19:14

Title

gRPC-Go: xDS RBAC HTTP Filter bypass via mixed-case Header Matching and gRFC A41 validation evasion

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as X-Role or User-Agent therefore does not match and fails open, allowing requests that should be rejected. The same case mismatch permits :Scheme or Grpc-Status to evade gRFC A41 validation and prevents Host from being rewritten to :authority. This issue is fixed in version 1.83.1.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 19:14 UTC

CWE

CWE-178 - Improper Handling of Case Sensitivity
CWE-863 - Incorrect Authorization

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/grpc/grpc-go/security/advisori…	x_refsource_CONFIRM
https://github.com/grpc/grpc-go/pull/9332	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9335	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/db9482836c…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/ebba6f3f1b…	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.83.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
grpc	grpc-go	Affected: < 1.83.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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CVE-2026-84304 (GCVE-0-2026-84304)

Vulnerability from cvelistv5 – Published: 2026-09-01 18:19 – Updated: 2026-09-01 19:24

Title

gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 19:23 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/grpc/grpc-go/security/advisori…	x_refsource_CONFIRM
https://github.com/grpc/grpc-go/pull/9331	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9333	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/7354d9c8de…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/8cfeca0e1e…	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.83.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
grpc	grpc-go	Affected: < 1.83.1

Show details on NVD website

JSON

To clipboard

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CVE-2026-84445 (GCVE-0-2026-84445)

Vulnerability from cvelistv5 – Published: 2026-09-14 16:11 – Updated: 2026-09-14 16:36

Title

gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 16:36 UTC

CWE

CWE-129 - Improper Validation of Array Index
CWE-248 - Uncaught Exception

Assigner

GitHub_M mitre root

References

10 references

URL	Tags
https://github.com/grpc/grpc-go/security/advisori…	x_refsource_CONFIRM
https://github.com/grpc/grpc-go/issues/9354	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9365	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9366	x_refsource_MISC
https://github.com/grpc/grpc-go/pull/9367	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/3822494d8e…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/8668b69c16…	x_refsource_MISC
https://github.com/grpc/grpc-go/commit/93e31b4854…	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.82.2	x_refsource_MISC
https://github.com/grpc/grpc-go/releases/tag/v1.83.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
grpc	grpc-go	Affected: < 1.82.2 Affected: >= 1.83.0, < 1.83.2

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Sightings

Author	Source	Type	Date	Other

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Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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