Which versions of Janet are affected by CVE-2026-2240?

CVE-2026-2240 is a low-severity vulnerability in janet-lang janet (CVSS 3.3). The limited severity suggests constrained impact, typically requiring specific conditions or local access for…. A patch is available.

Is there a public PoC exploit available for CVE-2026-2240?

Yes, a public proof-of-concept exploit is available for CVE-2026-2240. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-2240?

During next maintenance window: Apply vendor patches when convenient. Vendor patch is available.

Janet CVE-2026-2240

Q: What is the CVSS score of CVE-2026-2240?

CVE-2026-2240 has a CVSS 4.0 base score of 1.9 (Low). CVSS 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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

LOW

Buffer Overflow (CWE-119)

2026-02-09 cna@vuldb.com

Buffer Overflow Janet Janet Lang

1.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.9 LOW

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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

3.3 (LOW) 1.9 (LOW)

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 25, 2026 - 14:43 vuln.today

Public exploit code

Patch released

Feb 25, 2026 - 14:43 nvd

Patch available

CVE Published

Feb 09, 2026 - 16:16 nvd

LOW 3.3

DescriptionCVE.org

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.

AnalysisAI

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. [CVSS 3.3 LOW]

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Janet. 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.