PT-2026-22508 · Wren · Wren

Oneafter · Published 2026-03-01 · Updated 2026-03-05 · CVE-2026-3386

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions wren-lang wren versions up to 0.4.0

Description A flaw exists in the emitOp function within the src/vm/wren compiler.c file of wren-lang wren. This manipulation can lead to an out-of-bounds read. The issue is potentially exploitable on a local host. The project was informed of the problem but has not responded.

Recommendations Versions prior to 0.4.0 should be used. As a temporary workaround, consider restricting the use of the emitOp function until a patch is available.

Exploit

Fix

Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-119

CWE-125

Related Identifiers

CVE-2026-3386

Affected Products

Wren

References · 13

• 🔥 https://github.com/oneafter/0122/blob/main/i1219/repro · Exploit
• https://github.com/wren-lang/wren/issues/1219 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-3386 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3386 · Security Note
• https://vuldb.com/?submit.761306 · Note
• https://twitter.com/CVEnew/status/2028031236544037204 · Twitter Post
• https://twitter.com/infoflowcloud/status/2028031397382770976 · Twitter Post
• https://t.me/cveNotify/154249 · Telegram Post
• https://vuldb.com/?ctiid.348272 · Note
• https://github.com/wren-lang/wren · Note
• https://vuldb.com/?id.348272 · Note
• https://t.me/CVEtracker/46060 · Telegram Post
• https://t.me/cveNotify/153665 · Telegram Post