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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.

PUBLISHED Reserved 2026-02-28 | Published 2026-03-01 | Updated 2026-03-02 | 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

NULL Pointer Dereference

Denial of Service

Product status

0.1
affected

0.2
affected

0.3
affected

0.4.0
affected

Timeline

2026-02-28:Advisory disclosed
2026-02-28:VulDB entry created
2026-02-28:VulDB entry last update

Credits

Oneafter (VulDB User) reporter

References

vuldb.com/?id.348273 (VDB-348273 | wren-lang wren wren_compiler.c getByteCountForArguments null pointer dereference) vdb-entry technical-description

vuldb.com/?ctiid.348273 (VDB-348273 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.761312 (Submit #761312 | wren-lang wren main-branch NULL Pointer Dereference) third-party-advisory

github.com/wren-lang/wren/issues/1220 issue-tracking

github.com/oneafter/0122/blob/main/i1220/repro exploit

github.com/wren-lang/wren/ product

cve.org (CVE-2026-3387)

nvd.nist.gov (CVE-2026-3387)

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