PatchTheCVECVE-2026-2858: A vulnerability was identified in wren-lang wren up to 0.4.0
CVE-2026-2858 is a low-severity flaw (CVSS 3.3) affecting wren. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-2858?
wren: upgrade to newer than 0.4.0. Exact commands for each OS are on this page.
Is CVE-2026-2858 being exploited?
CVE-2026-2858 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-2858 affect?
CVE-2026-2858 affects wren. Severity is low (CVSS 3.3). 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 p
How urgent is CVE-2026-2858?
Priority 12/100. No elevated risk signals yet.
Related CVEs
- CVE-2026-2657 LOW 3.3 UPGRADE A vulnerability has been found in wren-lang wren up to 0.4.0