CVE-2025-9086 (GCVE-0-2025-9086)
Vulnerability from cvelistv5 – Published: 2025-09-12 05:10 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
Out of bounds read for cookie path
Summary
1. A cookie is set using the `secure` keyword for `https://target`
2. curl is redirected to or otherwise made to speak with `http://target` (same
hostname, but using clear text HTTP) using the same cookie set
3. The same cookie name is set - but with only a slash as path (`path="/"`).
Since this site is not secure, the cookie *should* be ignored.
4. A bug in the path comparison logic makes curl read outside a heap buffer
boundary
The bug either causes a crash or it potentially makes the comparison come to
the wrong conclusion and lets the clear-text site override the contents of the
secure cookie, contrary to expectations and depending on the memory contents
immediately following the single-byte allocation that holds the path.
The presumed and correct behavior would be to plainly ignore the second set of
the cookie since it was already set as secure on a secure host so overriding
it on an insecure host should not be okay.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-12 17:15 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
7 references
Impacted products
20 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| curl | curl |
Affected:
8.13.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.0 (semver) |
guessed | |
| curl | curl |
Affected:
1aea05a6c2699e80c75936d58569851555acd603 , < c6ae07c6a541e0e96d0040afb62b45dd37711300
(git)
|
guessed | |
| curl | curl |
Affected:
8.15.0
Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 |
guessed | |
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V4.0
(custom)
|
guessed | |
| Siemens | SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCH328 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCM324 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCM328 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCM332 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRH334 (24 V DC, 8xFO, CC) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (230 V AC, 12xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (230 V AC, 8xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (24 V DC, 12xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (24 V DC, 8xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (2x230 V AC, 12xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (2x230 V AC, 8xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) |
Affected:
0 , < V3.3
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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}
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"title": "CISA ADP Vulnrichment"
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{
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"url": "http://www.openwall.com/lists/oss-security/2025/09/10/1"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2026/01/msg00002.html"
}
],
"title": "CVE Program Container"
},
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"affected": [
{
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"product": "RUGGEDCOM RST2428P",
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{
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},
{
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},
{
"defaultStatus": "unknown",
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{
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{
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{
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{
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"version": "0",
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},
{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (230 V AC, 12xFO)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (230 V AC, 8xFO)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+)",
"vendor": "Siemens",
"versions": [
{
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"version": "0",
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{
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"product": "SCALANCE XRM334 (24 V DC, 12xFO)",
"vendor": "Siemens",
"versions": [
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"status": "affected",
"version": "0",
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{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (24 V DC, 8xFO)",
"vendor": "Siemens",
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"version": "0",
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{
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"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (2x230 V AC, 12xFO)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (2x230 V AC, 8xFO)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T12:59:46.514Z",
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-089022.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html"
}
],
"x_adpType": "supplier"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"lessThan": "8.14.2",
"status": "affected",
"version": "8.13.0",
"versionType": "semver"
},
{
"lessThan": "8.16.0",
"status": "affected",
"version": "8.15.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"versions": [
{
"lessThan": "c6ae07c6a541e0e96d0040afb62b45dd37711300",
"status": "affected",
"version": "1aea05a6c2699e80c75936d58569851555acd603",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Google Big Sleep"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Daniel Stenberg"
}
],
"descriptions": [
{
"lang": "en",
"value": "1. A cookie is set using the `secure` keyword for `https://target`\n2. curl is redirected to or otherwise made to speak with `http://target` (same\n hostname, but using clear text HTTP) using the same cookie set\n3. The same cookie name is set - but with only a slash as path (`path=\"/\"`).\n Since this site is not secure, the cookie *should* be ignored.\n4. A bug in the path comparison logic makes curl read outside a heap buffer\n boundary\n\nThe bug either causes a crash or it potentially makes the comparison come to\nthe wrong conclusion and lets the clear-text site override the contents of the\nsecure cookie, contrary to expectations and depending on the memory contents\nimmediately following the single-byte allocation that holds the path.\n\nThe presumed and correct behavior would be to plainly ignore the second set of\nthe cookie since it was already set as secure on a secure host so overriding\nit on an insecure host should not be okay."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T06:02:35.281Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"shortName": "curl"
},
"references": [
{
"url": "https://curl.se/docs/CVE-2025-9086.json"
},
{
"url": "https://curl.se/docs/CVE-2025-9086.html"
},
{
"url": "https://hackerone.com/reports/3294999"
}
],
"title": "Out of bounds read for cookie path",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
{
"introduced": "8.13.0"
},
{
"fixed": "8.14.2"
},
{
"introduced": "8.15.0"
},
{
"fixed": "8.16.0"
}
],
"type": "SEMVER"
},
{
"events": [
{
"introduced": "1aea05a6c2699e80c75936d58569851555acd603"
},
{
"fixed": "c6ae07c6a541e0e96d0040afb62b45dd37711300"
}
],
"repo": "https://github.com/curl/curl.git",
"type": "GIT"
}
],
"versions": [
"8.15.0",
"8.14.1",
"8.14.0",
"8.13.0"
]
}
],
"aliases": [
"CVE-2025-9086"
],
"credits": [
{
"name": "Google Big Sleep",
"type": "finder"
},
{
"name": "Daniel Stenberg",
"type": "remediation developer"
}
],
"database_specific": {
"CWE": {
"desc": "Out-of-bounds Read",
"id": "CWE-125"
},
"URL": "https://curl.se/docs/CVE-2025-9086.json",
"affects": "lib",
"award": {
"amount": "505",
"currency": "USD"
},
"issue": "https://hackerone.com/reports/3294999",
"last_affected": "8.15.0",
"package": "curl",
"severity": "Low",
"www": "https://curl.se/docs/CVE-2025-9086.html"
},
"details": "1. A cookie is set using the `secure` keyword for `https://target`\n2. curl is redirected to or otherwise made to speak with `http://target` (same\n hostname, but using clear text HTTP) using the same cookie set\n3. The same cookie name is set - but with only a slash as path (`path=\"/\"`).\n Since this site is not secure, the cookie *should* be ignored.\n4. A bug in the path comparison logic makes curl read outside a heap buffer\n boundary\n\nThe bug either causes a crash or it potentially makes the comparison come to\nthe wrong conclusion and lets the clear-text site override the contents of the\nsecure cookie, contrary to expectations and depending on the memory contents\nimmediately following the single-byte allocation that holds the path.\n\nThe presumed and correct behavior would be to plainly ignore the second set of\nthe cookie since it was already set as secure on a secure host so overriding\nit on an insecure host should not be okay.",
"id": "CURL-CVE-2025-9086",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2025-09-10T08:00:00.00Z",
"schema_version": "1.5.0",
"summary": "Out of bounds read for cookie path"
}
}
},
"cveMetadata": {
"assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"assignerShortName": "curl",
"cveId": "CVE-2025-9086",
"datePublished": "2025-09-12T05:10:03.815Z",
"dateReserved": "2025-08-16T05:40:23.800Z",
"dateUpdated": "2026-09-15T06:02:35.281Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-9086",
"date": "2026-09-16",
"epss": "0.01395",
"percentile": "0.71014"
},
"microsoft_vex": {
"current_release_date": "2026-02-18T02:38:38.000Z",
"cve": "CVE-2025-9086",
"id": "msrc_CVE-2025-9086",
"initial_release_date": "2025-09-02T00:00:00.000Z",
"product_status:known_affected": "11",
"product_status:known_not_affected": "11",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "Out of bounds read for cookie path",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-9086.json",
"version": "4"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-9086\",\"sourceIdentifier\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"published\":\"2025-09-12T06:15:44.100\",\"lastModified\":\"2026-09-14T21:16:59.523\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"1. A cookie is set using the `secure` keyword for `https://target`\\n2. curl is redirected to or otherwise made to speak with `http://target` (same\\n hostname, but using clear text HTTP) using the same cookie set\\n3. The same cookie name is set - but with only a slash as path (`path=\\\"/\\\"`).\\n Since this site is not secure, the cookie *should* be ignored.\\n4. A bug in the path comparison logic makes curl read outside a heap buffer\\n boundary\\n\\nThe bug either causes a crash or it potentially makes the comparison come to\\nthe wrong conclusion and lets the clear-text site override the contents of the\\nsecure cookie, contrary to expectations and depending on the memory contents\\nimmediately following the single-byte allocation that holds the path.\\n\\nThe presumed and correct behavior would be to plainly ignore the second set of\\nthe cookie since it was already set as secure on a secure host so overriding\\nit on an insecure host should not be 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-01T11:51:54+00:00",
"cve": "CVE-2025-9086",
"id": "CVE-2025-9086",
"initial_release_date": "2025-09-12T05:10:03.815000+00:00",
"product_status:fixed": "319",
"product_status:known_affected": "14",
"product_status:known_not_affected": "211",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "curl: libcurl: Curl out of bounds read for cookie path",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-9086.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-16T00:19:36Z",
"cve": "CVE-2025-9086",
"id": "CVE-2025-9086",
"initial_release_date": "2025-09-10T23:27:12Z",
"product_status:first_fixed": "13",
"product_status:known_affected": "372",
"product_status:known_not_affected": "59",
"product_status:recommended": "237",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-9086",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-9086.json",
"version": "38"
},
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A cookie is set using the `secure` keyword for `https://target`\\n2. curl is redirected to or otherwise made to speak with `http://target` (same\\n hostname, but using clear text HTTP) using the same cookie set\\n3. The same cookie name is set - but with only a slash as path (`path=\\\"/\\\"`).\\n Since this site is not secure, the cookie *should* be ignored.\\n4. A bug in the path comparison logic makes curl read outside a heap buffer\\n boundary\\n\\nThe bug either causes a crash or it potentially makes the comparison come to\\nthe wrong conclusion and lets the clear-text site override the contents of the\\nsecure cookie, contrary to expectations and depending on the memory contents\\nimmediately following the single-byte allocation that holds the path.\\n\\nThe presumed and correct behavior would be to plainly ignore the second set of\\nthe cookie since it was already set as secure on a secure host so overriding\\nit on an insecure host should not be okay.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"shortName\": \"curl\", \"dateUpdated\": \"2026-09-15T06:02:35.281Z\"}}}",
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- 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.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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