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Description

A flaw has been found in wren-lang wren up to 0.4.0. Affected by this vulnerability is the function emitOp of the file src/vm/wren_compiler.c. This manipulation causes out-of-bounds read. It is possible to launch the attack on the local host. The exploit has been published 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

Out-of-Bounds Read

Memory Corruption

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.348272 (VDB-348272 | wren-lang wren wren_compiler.c emitOp out-of-bounds) vdb-entry technical-description

vuldb.com/?ctiid.348272 (VDB-348272 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.761306 (Submit #761306 | wren-lang wren main-branch Buffer Overflow) third-party-advisory

github.com/wren-lang/wren/issues/1219 issue-tracking

github.com/oneafter/0122/blob/main/i1219/repro exploit

github.com/wren-lang/wren/ product

cve.org (CVE-2026-3386)

nvd.nist.gov (CVE-2026-3386)

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