CVE-2025-65637A 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.
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
turbopuffer logrus turbopuffer:logrus | before 1.8.3; 1.9.0; 1.9.2 | NVD |
References
- https://github.com/mjuanxd/logrus-dos-pocexploit, third-party-advisory
- https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.mdexploit, third-party-advisory
- https://github.com/sirupsen/logrus/issues/1370exploit, issue-tracking, patch
- https://github.com/sirupsen/logrus/pull/1376issue-tracking, patch
- https://github.com/sirupsen/logrus/releases/tag/v1.8.3release-notes
- https://github.com/sirupsen/logrus/releases/tag/v1.9.1release-notes
- https://github.com/sirupsen/logrus/releases/tag/v1.9.3release-notes
- https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391exploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.