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TI-2026-02454 Aliases CVE-2026-2858GHSA-vm4c-6g35-79xf

wren-lang wren Source File wren_compiler.c peekChar out-of-bounds

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A vulnerability was identified in wren-lang wren up to 0.4.0. This affects the function peekChar of the file src/vm/wren_compiler.c of the component Source File Parser. Such manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00144 3rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wren-langwren0.1; 0.2; 0.3; 0.4.0—No fix listedCNA
  • wren Vendorwren-lang Affected 0.1; 0.2; 0.3; 0.4.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wren:wren:*:*:*:*:*:*:*:*up to 0.4.0Vulnerablewren-lang
  • cpe:2.3:a:wren:wren:*:*:*:*:*:*:*:* Versions up to 0.4.0 Vulnerable ·wren-lang

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2858
  2. 2026-10-03 Alias added: GHSA-vm4c-6g35-79xf

References

Exploit 1

Other 2

  • TI-2026-02923 wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference CVSS 4.0MEDIUM 4.8
  • TI-2026-02922 wren-lang wren wren_compiler.c emitOp out-of-bounds CVSS 4.0MEDIUM 4.8
  • TI-2026-02921 wren-lang wren wren_compiler.c resolveLocal recursion CVSS 4.0MEDIUM 4.8
  • TI-2026-02269 wren-lang wren Error Message wren_compiler.c printError stack-based overflow CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences