Vulnerability in Universal-Ctags Ctags
CVE-2026-2641
A weakness has been identified in universal-ctags ctags up to 6.2.1. The affected element is the function parseExpression/parseExprList of the file parsers/v.c of the component V Language Parser. Executing a manipulation can lead to uncontrolled recursion. It is possible to launch the attack on the local host. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (5.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Universal-Ctags Ctags — versions 6.2.0, 6.2.1
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/universal-ctags/ctags/issues/4369 (issue-tracking)
- github.com/oneafter/0116/blob/main/poc.v (exploit)
- github.com/universal-ctags/ctags/ (product)
Frequently asked questions
- What is CVE-2026-2641?
- CVE-2026-2641 is a low-severity vulnerability in Universal-Ctags Ctags, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-02-18.
- How severe is CVE-2026-2641?
- Low severity. CVSS v3 base score is 3.3 out of 10.