CVE-2026-3387wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference
Updated under an hour ago ()
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It affects wren-lang wren and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A vulnerability has been found in wren-lang wren up to 0.4.0. Affected by this issue is the function getByteCountForArguments of the file src/vm/wren_compiler.c. Such manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
- CVSS
- 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
- Weakness (CWE)
- CWE-476, CWE-404
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Analyzed
- Record last updated
- Mar 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wren-lang wren wren_lang:wren (from the name) | 0.1; 0.2; 0.3; 0.4.0 | CNA record |
wren wren wren:wren | through 0.4.0 | NVD |
References
- https://vuldb.com/?id.348273vdb-entry, technical-description, third-party-advisory
- https://vuldb.com/?ctiid.348273signature, permissions-required, vdb-entry
- https://vuldb.com/?submit.761312third-party-advisory, vdb-entry
- https://github.com/wren-lang/wren/issues/1220issue-tracking, exploit, vendor-advisory
- https://github.com/oneafter/0122/blob/main/i1220/reproexploit
- https://github.com/wren-lang/wren/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.