Resource exhaustion in logrus - CVE-2025-65637
Published: January 15, 2026
Vulnerability identifier: #VU121565
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-65637
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Simon Eskildsen
Affected software:
logrus
logrus
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
How to mitigate CVE-2025-65637
Install updates from vendor's website.
Sources
- https://github.com/mjuanxd/logrus-dos-poc
- https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md
- https://github.com/sirupsen/logrus/issues/1370
- https://github.com/sirupsen/logrus/pull/1376
- https://github.com/sirupsen/logrus/releases/tag/v1.8.3
- https://github.com/sirupsen/logrus/releases/tag/v1.9.1
- https://github.com/sirupsen/logrus/releases/tag/v1.9.3
- https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391