Uncontrolled Recursion Vulnerability in Universal-ctags V Language Parser
CVE-2026-2641

4.8MEDIUM

Key Information:

Vendor

Universal-ctags

Status
Ctags
Vendor
CVE Published:
18 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2641?

A vulnerability has been identified in the universal-ctags tool, specifically within the V Language Parser. This weakness, found in the function parseExpression and parseExprList of the file parsers/v.c, allows for uncontrolled recursion to occur. When exploited, this can lead to detrimental performance impacts on the local host, potentially causing denial-of-service conditions. While an exploit has been made publicly available, the project maintainers were notified early through an issue report but have yet to address the issue.

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Affected Version(s)

ctags 6.2.0

ctags 6.2.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-2641 - Proof of Concept

References

https://vuldb.com/?id.346397
vdb-entrytechnical-description
https://vuldb.com/?ctiid.346397
signaturepermissions-required
https://vuldb.com/?submit.752768
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
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