{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54576","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-15T19:15:27.343Z","datePublished":"2026-09-17T16:58:25.028Z","dateUpdated":"2026-09-18T14:44:36.712Z"},"containers":{"cna":{"title":"mport package installation has symlink TOCTOU in chown and chmod handling","problemTypes":[{"descriptions":[{"cweId":"CWE-59","lang":"en","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-367","lang":"en","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/MidnightBSD/mport/security/advisories/GHSA-23g3-7fv3-3ccf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/MidnightBSD/mport/security/advisories/GHSA-23g3-7fv3-3ccf"},{"name":"https://github.com/MidnightBSD/mport/pull/150","tags":["x_refsource_MISC"],"url":"https://github.com/MidnightBSD/mport/pull/150"},{"name":"https://github.com/MidnightBSD/mport/commit/4676ac05b1056b54a3d38d03ae8a478bf12c9abe","tags":["x_refsource_MISC"],"url":"https://github.com/MidnightBSD/mport/commit/4676ac05b1056b54a3d38d03ae8a478bf12c9abe"},{"name":"https://github.com/MidnightBSD/mport/releases/tag/2.7.8","tags":["x_refsource_MISC"],"url":"https://github.com/MidnightBSD/mport/releases/tag/2.7.8"}],"affected":[{"vendor":"MidnightBSD","product":"mport","versions":[{"version":"< 2.7.8","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-17T16:58:25.028Z"},"descriptions":[{"lang":"en","value":"mport is the MidnightBSD Package Manager. Prior to 2.7.8, do_actual_install() in libmport/bundle_read_install_pkg.c used path-based lstat(), chown(), stat(), and chmod() operations while installing package files. A local attacker with write access to a target directory could replace a checked file with a symlink before privileged ownership or mode changes were applied, redirecting those changes to an attacker-selected path and compromising filesystem integrity or permissions. This issue is fixed in version 2.7.8."}],"source":{"advisory":"GHSA-23g3-7fv3-3ccf","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T14:36:39.720536Z","id":"CVE-2026-54576","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-18T14:44:36.712Z"}}]}}