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CVE

CVE-2025-65637

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.
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CVE

CVE-2025-65637

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.

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/mjuanxd/logrus-dos-poc, https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md, 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, https://github.com/sirupsen/logrus/issues/1370, https://github.com/sirupsen/logrus/pull/1376

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00033%
EPSS Percentile
0.09282%
Introduced Version
0
Fix Available
d40e25cd45ed9c6b2b66e6b97573a0413e4c23bd,0:0.11.0-2.amzn2023,0:1.82.2-1.amzn2023,0:0.11.0-2.amzn2,0:1.82.2-1.amzn2

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