CVE-2025-9086 (GCVE-0-2025-9086)
Vulnerability from cvelistv5
Published
2025-09-12 05:10
Modified
2026-09-15 06:02
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
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.
References
Impacted products
Vendor Product Version
curl curl Version: 8.13.0   ≤
Version: 8.15.0   ≤
Create a notification for this product.
   curl curl Version: 1aea05a6c2699e80c75936d58569851555acd603
 Create a notification for this product.
   curl curl Version: 8.15.0
Version: 8.14.1
Version: 8.14.0
Version: 8.13.0
 Create a notification for this product.
Show details on NVD website

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        "id": "CURL-CVE-2025-9086",
        "modified": "2026-09-07T10:34:51.00Z",
        "published": "2025-09-10T08:00:00.00Z",
        "schema_version": "1.5.0",
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\"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-9086\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-09-12T17:15:47.921625Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-09-12T17:16:09.204Z\"}}], \"cna\": {\"title\": \"Out of bounds read for cookie path\", \"x_osv\": {\"id\": \"CURL-CVE-2025-9086\", \"aliases\": [\"CVE-2025-9086\"], \"credits\": [{\"name\": \"Google Big Sleep\", \"type\": \"finder\"}, {\"name\": \"Daniel Stenberg\", \"type\": \"remediation developer\"}], \"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.\", \"summary\": \"Out of bounds read for cookie path\", \"affected\": [{\"ranges\": [{\"type\": \"SEMVER\", \"events\": [{\"introduced\": \"8.13.0\"}, {\"fixed\": \"8.14.2\"}, {\"introduced\": \"8.15.0\"}, {\"fixed\": \"8.16.0\"}]}, {\"repo\": \"https://github.com/curl/curl.git\", \"type\": \"GIT\", \"events\": [{\"introduced\": \"1aea05a6c2699e80c75936d58569851555acd603\"}, {\"fixed\": \"c6ae07c6a541e0e96d0040afb62b45dd37711300\"}]}], \"versions\": [\"8.15.0\", \"8.14.1\", \"8.14.0\", \"8.13.0\"]}], \"modified\": \"2026-09-07T10:34:51.00Z\", \"published\": \"2025-09-10T08:00:00.00Z\", \"schema_version\": \"1.5.0\", \"database_specific\": {\"CWE\": {\"id\": \"CWE-125\", \"desc\": \"Out-of-bounds Read\"}, \"URL\": \"https://curl.se/docs/CVE-2025-9086.json\", \"www\": \"https://curl.se/docs/CVE-2025-9086.html\", \"award\": {\"amount\": \"505\", \"currency\": \"USD\"}, \"issue\": \"https://hackerone.com/reports/3294999\", \"affects\": \"lib\", \"package\": \"curl\", \"severity\": \"Low\", \"last_affected\": \"8.15.0\"}}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Google Big Sleep\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Daniel Stenberg\"}], \"affected\": [{\"vendor\": \"curl\", \"product\": \"curl\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.13.0\", \"lessThan\": \"8.14.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"8.15.0\", \"lessThan\": \"8.16.0\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://github.com/curl/curl.git\", \"vendor\": \"curl\", \"product\": \"curl\", \"versions\": [{\"status\": \"affected\", \"version\": \"1aea05a6c2699e80c75936d58569851555acd603\", \"lessThan\": \"c6ae07c6a541e0e96d0040afb62b45dd37711300\", \"versionType\": \"git\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"curl\", \"product\": \"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\"}], \"defaultStatus\": \"unaffected\"}], \"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\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"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\": [{\"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\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-9086\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-15T06:02:35.281Z\", \"dateReserved\": \"2025-08-16T05:40:23.800Z\", \"assignerOrgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"datePublished\": \"2025-09-12T05:10:03.815Z\", \"assignerShortName\": \"curl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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