{"id":"CVE-2025-65637","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-65637","generatedAt":"2026-10-28T00:17:56.486Z","title":"A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters.","description":"A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with \"token too long\" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.","published":"2025-12-04T19:16:05.000Z","lastModified":"2026-06-17T09:55:51.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400"],"affected":["turbopuffer/logrus"],"epss":{"score":0.0063,"percentile":0.49886,"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 (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/mjuanxd/logrus-dos-poc","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/sirupsen/logrus/issues/1370","tags":["Exploit","Issue Tracking","Patch"],"source":"cve@mitre.org"},{"url":"https://github.com/sirupsen/logrus/pull/1376","tags":["Issue Tracking","Patch"],"source":"cve@mitre.org"},{"url":"https://github.com/sirupsen/logrus/releases/tag/v1.8.3","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"https://github.com/sirupsen/logrus/releases/tag/v1.9.1","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"https://github.com/sirupsen/logrus/releases/tag/v1.9.3","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-65637","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."}