{"id":"CVE-2026-45793","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-45793","generatedAt":"2026-10-28T01:19:29.983Z","title":"Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\\IO\\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the…","description":"Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\\IO\\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_<id>_<base64url-JWT> format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8.","published":"2026-07-15T17:16:48.000Z","lastModified":"2026-07-15T20:54:44.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-200"],"affected":[],"epss":{"score":0.01021,"percentile":0.63189,"date":"2026-10-26","history":[]},"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 (1.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/composer/composer/commit/3f5e7f9fbfa541137d6d1d5643ec3b718e9d5039","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/commit/65e6390c49f1a11cd8b660d81822086db51fe2d1","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/commit/e66c8fdb7ff5409bd2f358c5f194038e49e93714","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/pull/12853","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/pull/12855","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/releases/tag/1.10.28","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/releases/tag/2.2.28","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/releases/tag/2.9.8","source":"security-advisories@github.com"},{"url":"https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45793","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."}