CVE-2026-2240

medium

Description

A vulnerability has been found in janet-lang janet up to 1.40.1. The impacted element is the function janetc_pop_funcdef of the file src/core/compile.c. Such manipulation leads to out-of-bounds read. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The name of the patch is 4dd08a4cdef5b1c42d9a2c19fc24412e97ef51d5. A patch should be applied to remediate this issue.

References

https://vuldb.com/?submit.753155

https://vuldb.com/?id.344979

https://github.com/oneafter/0123/blob/main/ja4/repro

https://vuldb.com/?ctiid.344979

https://github.com/janet-lang/janet/issues/1702#issuecomment-3790473369

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

https://github.com/janet-lang/janet/commit/4dd08a4cdef5b1c42d9a2c19fc24412e97ef51d5

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

Details

Source: Mitre, NVD

Published: 2026-02-09

Updated: 2026-04-29

Risk Information

CVSS v2

Base Score: 1.7

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 6.1

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 4.8

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00013