CVE-2026-2240

low-risk
Published 2026-02-09

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.3/10 Low
LOCAL / LOW complexity

Affected Products (1)

Janet

Affected Vendors

Janet-Lang

References (8)

Product https://github.com/janet-lang/janet/
Patch https://github.com/janet-lang/janet/commit/4dd08a4cdef5b1c42d9a2c19fc24412e97ef5...
Exploit https://github.com/janet-lang/janet/issues/1702
Exploit https://github.com/janet-lang/janet/issues/1702#issuecomment-3790473369
Exploit https://github.com/oneafter/0123/blob/main/ja4/repro
Permissions Required https://vuldb.com/?ctiid.344979
Third Party Advisory https://vuldb.com/?id.344979
Third Party Advisory https://vuldb.com/?submit.753155
18
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal