VYPR
← All advisories
High severityOSV Advisory· Published Dec 4, 2025· Updated Dec 5, 2025

CVE-2025-65637

CVE-2025-65637

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/sirupsen/logrusGo
< 1.8.31.8.3
github.com/sirupsen/logrusGo
>= 1.9.0, < 1.9.11.9.1
github.com/sirupsen/logrusGo
>= 1.9.2, < 1.9.31.9.3

Affected products

142

Patches

Vulnerability mechanics

References

10

News mentions

0

No linked articles in our index yet.