{"id":"CVE-2026-55246","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-55246","generatedAt":"2026-10-28T04:34:05.078Z","title":"A crafted file can make the loop read and write beyond the heap allocation, and related unvalidated page sizes and cookie_offsets can drive additional out-of-bounds accesses in page and cookie iteration.","description":"bincookie is a header-only binarycookies parser. Prior to 0.1.9, bincookie_init_file() in bincookie.h allocates a buffer using the actual .binarycookies file length but trusts the file-controlled num_pages field as the loop bound for byte-swapping page_sizes entries. A crafted file can make the loop read and write beyond the heap allocation, and related unvalidated page sizes and cookie_offsets can drive additional out-of-bounds accesses in page and cookie iteration. Applications that parse an attacker-supplied binarycookies file may crash or suffer heap corruption that can potentially enable code execution. This issue is fixed in version 0.1.9.","published":"2026-10-15T18:17:27.000Z","lastModified":"2026-10-16T20:04:30.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-122","CWE-787"],"affected":[],"epss":{"score":0.00222,"percentile":0.12666,"date":"2026-10-27","history":[{"date":"2026-10-16","score":0.00222,"percentile":0.1185}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T18:17:27.000Z","detail":{"score":"7.8","severity":"HIGH","publishedAt":"2026-10-15T18:17:27.317Z"},"summary":"New CVE, high severity (CVSS 7.8)."}],"references":[{"url":"https://github.com/Tatsh/bincookie/commit/bc1433c1ee4d0284750ff85c8437f1b8df91ab3b","source":"security-advisories@github.com"},{"url":"https://github.com/Tatsh/bincookie/releases/tag/v0.1.9","source":"security-advisories@github.com"},{"url":"https://github.com/Tatsh/bincookie/security/advisories/GHSA-22pc-xxw4-q849","source":"security-advisories@github.com"},{"url":"https://github.com/Tatsh/bincookie/security/advisories/GHSA-22pc-xxw4-q849","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55246","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}