CVE-2025-65637
7.5 · HIGHOverview
CVE-2025-65637 is a high-severity vulnerability affecting turbopuffer logrus. It was published on December 4, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from turbopuffer. Update logrus to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| turbopuffer | logrus | >= 0, < 1.8.3 | Affected |
References
Frequently Asked Questions
What is CVE-2025-65637?
CVE-2025-65637 is a high-severity vulnerability affecting turbopuffer logrus. It was published on December 4, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-65637?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-65637?
Check the references section for vendor advisories and patches from turbopuffer. Update logrus to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-65637?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-65637 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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