Resource exhaustion in Turbopuffer Logrus
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Turbopuffer Logrus — versions 1.9.0, 1.9.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mjuanxd/logrus-dos-poc (Exploit, Third Party Advisory)
- github.com/sirupsen/logrus/issues/1370 (Exploit, Patch, Issue Tracking)
- github.com/sirupsen/logrus/pull/1376 (Patch, Issue Tracking)
- github.com/sirupsen/logrus/releases/tag/v1.8.3 (Release Notes)
- github.com/sirupsen/logrus/releases/tag/v1.9.1 (Release Notes)
- github.com/sirupsen/logrus/releases/tag/v1.9.3 (Release Notes)
- security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391 (Exploit, Third Party Advisory)
- github.com/mjuanxd/logrus-dos-poc/blob/main/README.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-65637?
- CVE-2025-65637 is a high-severity vulnerability in Turbopuffer Logrus, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-12-04.
- How severe is CVE-2025-65637?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-65637 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.