CVE-2026-2240

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.

CVSS v3 3.3 LOW
CVSS v2.0 1.7 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

1.7^/10

CVSS v2.0 : LOW

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

Exploitability : 3.1 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/janet-lang/janet/	Product
https://github.com/janet-lang/janet/commit/4dd08a4cdef5b1c42d9a2c19fc24412e97ef51d5	Patch
https://github.com/janet-lang/janet/issues/1702	Exploit Issue Tracking
https://github.com/janet-lang/janet/issues/1702#issuecomment-3790473369	Exploit Issue Tracking
https://github.com/oneafter/0123/blob/main/ja4/repro	Exploit
https://vuldb.com/?ctiid.344979	Permissions Required VDB Entry
https://vuldb.com/?id.344979	Third Party Advisory VDB Entry
https://vuldb.com/?submit.753155	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:janet-lang:janet:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-09 16:16

Updated : 2026-06-17 10:30

NVD link : CVE-2026-2240

Mitre link : CVE-2026-2240

CVE.ORG link : CVE-2026-2240

JSON object : View

Products Affected

janet-lang

janet

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-125

Out-of-bounds Read

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