Description
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.
References (6)
Core 6
Core References
Permissions Required, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.348273
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.348273
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.761312
Issue Tracking issue-tracking
https://github.com/wren-lang/wren/issues/1220
Third Party Advisory exploit
https://github.com/oneafter/0122/blob/main/i1220/repro
Scores
CVSS v3
3.3
EPSS
0.0016
EPSS Percentile
5.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-404
CWE-476
Status
published
Products (1)
wren/wren
< 0.4.0
Published
Mar 01, 2026
Tracked Since
Mar 01, 2026