How severe is CVE-2026-2240?

CVE-2026-2240 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-2240 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2240?

CVE-2026-2240 affects Janet-lang Janet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2240?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2240 have an EU (EUVD) identifier?

Yes. CVE-2026-2240 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6908.

When was CVE-2026-2240 published?

CVE-2026-2240 was published on 2026-02-09 and last updated on 2026-06-17.

CVE-2026-2240

CVE-2026-2240 is a low-severity vulnerability in Janet-lang Janet with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6908
Weakness: CWE-125
Affected product: Janet-lang Janet
Published: 2026-02-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-2240?: CVE-2026-2240 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-2240 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2240?: CVE-2026-2240 affects Janet-lang Janet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2240?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2240 have an EU (EUVD) identifier?: Yes. CVE-2026-2240 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6908.
When was CVE-2026-2240 published?: CVE-2026-2240 was published on 2026-02-09 and last updated on 2026-06-17.

References

Affected products (1)

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

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