CVE-2025-9086 (GCVE-0-2025-9086)
Vulnerability from cvelistv5
Published
2025-09-12 05:10
Modified
2025-09-12 17:16
Severity ?
VLAI Severity ?
EPSS score ?
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 just a slash as path (`path='/'`).
Since this site is not secure, the cookie *should* just 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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| curl | curl |
Version: 8.15.0 ≤ 8.15.0 Version: 8.14.1 ≤ 8.14.1 Version: 8.14.0 ≤ 8.14.0 Version: 8.13.0 ≤ 8.13.0 Version: 8.12.1 ≤ 8.12.1 Version: 8.12.0 ≤ 8.12.0 Version: 8.11.1 ≤ 8.11.1 Version: 8.11.0 ≤ 8.11.0 Version: 8.10.1 ≤ 8.10.1 Version: 8.10.0 ≤ 8.10.0 Version: 8.9.1 ≤ 8.9.1 Version: 8.9.0 ≤ 8.9.0 Version: 8.8.0 ≤ 8.8.0 Version: 8.7.1 ≤ 8.7.1 Version: 8.7.0 ≤ 8.7.0 Version: 8.6.0 ≤ 8.6.0 Version: 8.5.0 ≤ 8.5.0 Version: 8.4.0 ≤ 8.4.0 Version: 8.3.0 ≤ 8.3.0 Version: 8.2.1 ≤ 8.2.1 Version: 8.2.0 ≤ 8.2.0 Version: 8.1.2 ≤ 8.1.2 Version: 8.1.1 ≤ 8.1.1 Version: 8.1.0 ≤ 8.1.0 Version: 8.0.1 ≤ 8.0.1 Version: 8.0.0 ≤ 8.0.0 Version: 7.88.1 ≤ 7.88.1 Version: 7.88.0 ≤ 7.88.0 Version: 7.87.0 ≤ 7.87.0 Version: 7.86.0 ≤ 7.86.0 Version: 7.85.0 ≤ 7.85.0 Version: 7.84.0 ≤ 7.84.0 Version: 7.83.1 ≤ 7.83.1 Version: 7.83.0 ≤ 7.83.0 Version: 7.82.0 ≤ 7.82.0 Version: 7.81.0 ≤ 7.81.0 Version: 7.80.0 ≤ 7.80.0 Version: 7.79.1 ≤ 7.79.1 Version: 7.79.0 ≤ 7.79.0 Version: 7.78.0 ≤ 7.78.0 Version: 7.77.0 ≤ 7.77.0 Version: 7.76.1 ≤ 7.76.1 Version: 7.76.0 ≤ 7.76.0 Version: 7.75.0 ≤ 7.75.0 Version: 7.74.0 ≤ 7.74.0 Version: 7.73.0 ≤ 7.73.0 Version: 7.72.0 ≤ 7.72.0 Version: 7.71.1 ≤ 7.71.1 Version: 7.71.0 ≤ 7.71.0 Version: 7.70.0 ≤ 7.70.0 Version: 7.69.1 ≤ 7.69.1 Version: 7.69.0 ≤ 7.69.0 Version: 7.68.0 ≤ 7.68.0 Version: 7.67.0 ≤ 7.67.0 Version: 7.66.0 ≤ 7.66.0 Version: 7.65.3 ≤ 7.65.3 Version: 7.65.2 ≤ 7.65.2 Version: 7.65.1 ≤ 7.65.1 Version: 7.65.0 ≤ 7.65.0 Version: 7.64.1 ≤ 7.64.1 Version: 7.64.0 ≤ 7.64.0 Version: 7.63.0 ≤ 7.63.0 Version: 7.62.0 ≤ 7.62.0 Version: 7.61.1 ≤ 7.61.1 Version: 7.61.0 ≤ 7.61.0 Version: 7.60.0 ≤ 7.60.0 Version: 7.59.0 ≤ 7.59.0 Version: 7.58.0 ≤ 7.58.0 Version: 7.57.0 ≤ 7.57.0 Version: 7.56.1 ≤ 7.56.1 Version: 7.56.0 ≤ 7.56.0 Version: 7.55.1 ≤ 7.55.1 Version: 7.55.0 ≤ 7.55.0 Version: 7.54.1 ≤ 7.54.1 Version: 7.54.0 ≤ 7.54.0 Version: 7.53.1 ≤ 7.53.1 Version: 7.53.0 ≤ 7.53.0 Version: 7.52.1 ≤ 7.52.1 Version: 7.52.0 ≤ 7.52.0 Version: 7.51.0 ≤ 7.51.0 Version: 7.50.3 ≤ 7.50.3 Version: 7.50.2 ≤ 7.50.2 Version: 7.50.1 ≤ 7.50.1 Version: 7.50.0 ≤ 7.50.0 Version: 7.49.1 ≤ 7.49.1 Version: 7.49.0 ≤ 7.49.0 Version: 7.48.0 ≤ 7.48.0 Version: 7.47.1 ≤ 7.47.1 Version: 7.47.0 ≤ 7.47.0 Version: 7.46.0 ≤ 7.46.0 Version: 7.45.0 ≤ 7.45.0 Version: 7.44.0 ≤ 7.44.0 Version: 7.43.0 ≤ 7.43.0 Version: 7.42.1 ≤ 7.42.1 Version: 7.42.0 ≤ 7.42.0 Version: 7.41.0 ≤ 7.41.0 Version: 7.40.0 ≤ 7.40.0 Version: 7.39.0 ≤ 7.39.0 Version: 7.38.0 ≤ 7.38.0 Version: 7.37.1 ≤ 7.37.1 Version: 7.37.0 ≤ 7.37.0 Version: 7.36.0 ≤ 7.36.0 Version: 7.35.0 ≤ 7.35.0 Version: 7.34.0 ≤ 7.34.0 Version: 7.33.0 ≤ 7.33.0 Version: 7.32.0 ≤ 7.32.0 Version: 7.31.0 ≤ 7.31.0 |
{
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"availabilityImpact": "HIGH",
"baseScore": 7.5,
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"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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"content": {
"id": "CVE-2025-9086",
"options": [
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{
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{
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"role": "CISA Coordinator",
"timestamp": "2025-09-12T17:15:47.921625Z",
"version": "2.0.3"
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"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 just a slash as path (`path=\u0027/\u0027`).\n Since this site is not secure, the cookie *should* just 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": [
{
"description": "CWE-125 Out-of-bounds Read",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-12T05:10:03.815Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"shortName": "curl"
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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 just a slash as path (`path=\u0027/\u0027`).\\n Since this site is not secure, the cookie *should* just 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\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"shortName\": \"curl\", \"dateUpdated\": \"2025-09-12T05:10:03.815Z\"}}}",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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