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. 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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/mjuanxd/logrus-dos-poc	Exploit Third Party Advisory
https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md	Exploit Third Party Advisory
https://github.com/sirupsen/logrus/issues/1370	Exploit Issue Tracking Patch
https://github.com/sirupsen/logrus/pull/1376	Issue Tracking Patch
https://github.com/sirupsen/logrus/releases/tag/v1.8.3	Release Notes
https://github.com/sirupsen/logrus/releases/tag/v1.9.1	Release Notes
https://github.com/sirupsen/logrus/releases/tag/v1.9.3	Release Notes
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:turbopuffer:logrus::::::go::*
	cpe:2.3:a:turbopuffer:logrus:1.9.0:::::go::
	cpe:2.3:a:turbopuffer:logrus:1.9.2:::::go::

History

No history.

Information

Published : 2025-12-04 19:16

Updated : 2025-12-23 00:26

NVD link : CVE-2025-65637

Mitre link : CVE-2025-65637

CVE.ORG link : CVE-2025-65637

JSON object : View

Products Affected

turbopuffer

logrus

CWE

CWE-400

Uncontrolled Resource Consumption

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