CVE-2026-2869: A vulnerability was identified in janet-lang janet up to 1.40.1

Q: How do I fix CVE-2026-2869?

janet: upgrade to newer than 1.40.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-2869 being exploited?

CVE-2026-2869 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-2869 affect?

CVE-2026-2869 affects janet. Severity is low (CVSS 3.3). A vulnerability was identified in janet-lang janet up to 1.40.1. Affected by this vulnerability is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. The manipulation leads to out-of-bounds read.

Q: How urgent is CVE-2026-2869?

Priority 19/100. Public exploit reference

Routine

LOW 3.3UPGRADE

CVE-2026-2869 is a low-severity flaw (CVSS 3.3) affecting janet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was identified in janet-lang janet up to 1.40.1. Affected by this vulnerability is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. The manipulation leads to out-of-bounds read. The attack can only be performed from a local environment. The exploit is publicly available and might be used. Upgrading to version 1.41.0 addresses this issue. The identifier of the patch is 2fabc80151a2b883

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-119, CWE-125
Published	2026-02-21
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: janet-lang

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-21 15:15 UTCPublished CVE record published
2026-06-17 10:31 UTCUpdated Record last modified

janet-lang janet UPGRADE

Affected: <= 1.40.1

Fixed in: newer than 1.40.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy janet || rpm -q janet || janet --version

2. UPGRADE to newer than 1.40.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade janet

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade janet

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2869?

janet: upgrade to newer than 1.40.1. Exact commands for each OS are on this page.

Is CVE-2026-2869 being exploited?

CVE-2026-2869 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2869 affect?

CVE-2026-2869 affects janet. Severity is low (CVSS 3.3). A vulnerability was identified in janet-lang janet up to 1.40.1. Affected by this vulnerability is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. The manipulation leads to out-of-bounds read.

How urgent is CVE-2026-2869?

Priority 19/100. Public exploit reference

References

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