{"id":"CVE-2026-4539","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-4539","generatedAt":"2026-10-27T23:56:00.011Z","title":"A security flaw has been discovered in pygments up to 2.19.2.","description":"A security flaw has been discovered in pygments up to 2.19.2. The impacted element is the function AdlLexer of the file pygments/lexers/archetype.py. The manipulation results in inefficient regular expression complexity. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.","published":"2026-03-22T06:16:21.000Z","lastModified":"2026-06-17T10:56:47.000Z","status":"Deferred","sourceIdentifier":"cna@vuldb.com","cvss":{"version":"4.0","score":1.9,"severity":"LOW","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-400","CWE-1333"],"affected":[],"epss":{"score":0.00159,"percentile":0.05005,"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":"low","text":"Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/pygments/pygments/","source":"cna@vuldb.com"},{"url":"https://github.com/pygments/pygments/issues/3058","source":"cna@vuldb.com"},{"url":"https://vuldb.com/?ctiid.352327","source":"cna@vuldb.com"},{"url":"https://vuldb.com/?id.352327","source":"cna@vuldb.com"},{"url":"https://vuldb.com/?submit.774685","source":"cna@vuldb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-4539","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."}