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Description

A vulnerability has been found in wren-lang wren up to 0.4.0. This impacts the function printError of the file src/vm/wren_compiler.c of the component Error Message Handler. Such manipulation leads to stack-based buffer overflow. An attack has to be approached locally. 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.

PUBLISHED Reserved 2026-02-18 | Published 2026-02-18 | Updated 2026-02-23 | Assigner VulDB




MEDIUM: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
LOW: 3.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
1.7AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

0.1
affected

0.2
affected

0.3
affected

0.4.0
affected

Timeline

2026-02-18:Advisory disclosed
2026-02-18:VulDB entry created
2026-02-21:VulDB entry last update

Credits

Oneafter (VulDB User) reporter

References

vuldb.com/?id.346455 (VDB-346455 | wren-lang wren Error Message wren_compiler.c printError stack-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.346455 (VDB-346455 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.752791 (Submit #752791 | wren-lang wren main branch Stack-based Buffer Overflow) third-party-advisory

github.com/wren-lang/wren/issues/1221 issue-tracking

github.com/oneafter/0122/blob/main/i1221/repro exploit

github.com/wren-lang/wren/ product

cve.org (CVE-2026-2657)

nvd.nist.gov (CVE-2026-2657)

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