CVE-2025-65637
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductTurbopuffer Logrus
PublishedDec 4, 2025
First seenDec 4, 2025
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- turbopuffer logrus1.8.3 or later
- github.com/sirupsen/logrus1.8.3, 1.9.1, 1.9.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| turbopuffer logrus | v < 1.8.3, 1.9.0, 1.9.2 | 1.8.3 |
| github.com/sirupsen/logrusGo | v < 1.8.3, 1.9.0 ≤ v < 1.9.1, 1.9.2 ≤ v < 1.9.3 | 1.8.3, 1.9.1, 1.9.3 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.