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CWE

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CVE-2026-2242

Published: Feb 9, 2026

Modified: Feb 23, 2026

PUBLISHED

CVSS v3.1

3.3

LOW

Description

A vulnerability was determined in janet-lang janet up to 1.40.1. This impacts the function janetc_if of the file src/core/specials.c. Executing a manipulation can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called c43e06672cd9dacf2122c99f362120a17c34b391. It is advisable to implement a patch to correct this issue.

Vendor	Product	Versions
janet-lang	janet	affected `1.40.0` affected `1.40.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

VDB-344981 | janet-lang janet specials.c janetc_if out-of-bounds

vdb-entry

technical-description

VDB-344981 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #754495 | janet-lang janet 2fabc80 Heap-based Buffer Overflow

third-party-advisory

https://github.com/janet-lang/janet/issues/1700

issue-tracking

https://github.com/janet-lang/janet/issues/1702

issue-tracking

https://github.com/oneafter/0123/blob/main/ja2/repro

exploit

https://github.com/janet-lang/janet/commit/c43e06672cd9dacf2122c99f362120a17c34b391

patch

https://github.com/janet-lang/janet/

product

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