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 (8)
Core 8
Core References
Permissions Required, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.344979
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.344979
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.753155
Issue Tracking issue-tracking
https://github.com/janet-lang/janet/issues/1702
Issue Tracking issue-tracking
https://github.com/janet-lang/janet/issues/1702#issuecomment-3790473369
Various Sources exploit
https://github.com/oneafter/0123/blob/main/ja4/repro
Various Sources product
https://github.com/janet-lang/janet/
Scores
CVSS v3
3.3
EPSS
0.0016
EPSS Percentile
5.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-119
CWE-125
Status
published
Products (1)
janet-lang/janet
< 1.40.1
Published
Feb 09, 2026
Tracked Since
Feb 18, 2026