{"id":"CVE-2026-120627","title":"CVE-2026-120627","summary":"The Private Internet Access Extension for Firefox contains an unguarded onAuthRequired authentication handler, leading to leakage of PIA proxy credentials when a user visits any malicious website that issues a Basic auth challenge. This …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"adp","cwe":["CWE-287"],"vendor":"Private Internet Access","product":"Firefox extension","affected":["firefox_extension >= 3.2.5 <= 4.0.5"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-06T17:49:08.710782Z"},"published":"2026-11-02","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:50:08.315Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120627","references":[{"url":"https://addons.mozilla.org/en-US/firefox/addon/private-internet-access-ext/"},{"url":"https://github.com/Rexyysilent/PI-ay-ay-disclosure"}],"tags":["cve.org"],"epss":0.00295,"epssPercentile":0.22232,"ingestedAt":"2026-11-05T19:30:42.733Z","slug":"CVE-2026-120627","body":"## Overview\n\nThe Private Internet Access Extension for Firefox contains an unguarded onAuthRequired authentication handler, leading to leakage of PIA proxy credentials when a user visits any malicious website that issues a Basic auth challenge. This issue was fixed in version 3.2.5, but reintroduced in later versions.\n\n## Affected\n\n- `firefox_extension >= 3.2.5 <= 4.0.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":235485,"id":"CVE-2026-120627","ts":1793988049970,"field":"cvss","old":null,"new":"7.5"},{"seq":235484,"id":"CVE-2026-120627","ts":1793988049970,"field":"severity","old":"none","new":"high"}]}