janet-lang janet up to 1.40.1 handleattr src/core/specials.c janetc_varset out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability was found in janet-lang janet up to 1.40.1 and classified as problematic. Affected by this issue is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. The manipulation results in out-of-bounds. This vulnerability is identified as CVE-2026-2869. The attack is only possible with local access. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in janet-lang janet up to 1.40.1. Affected is the function janetc_varset of the file src/core/specials.c of the component handleattr Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-2869. The exploitability is told to be easy. Local access is required to approach this attack. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Upgrading to version 1.41.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2fabc80151a2b8834ee59cda8a70453f848b40e5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 3.3
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: janet 1.41.0
Patch: 2fabc80151a2b8834ee59cda8a70453f848b40e5

Timelineinfo

02/20/2026 Advisory disclosed
02/20/2026 +0 days VulDB entry created
02/27/2026 +7 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1699
Status: Confirmed

CVE: CVE-2026-2869 (🔒)
GCVE (CVE): GCVE-0-2026-2869
GCVE (VulDB): GCVE-100-347106
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/20/2026 15:39
Updated: 02/27/2026 13:50
Changes: 02/20/2026 15:39 (62), 02/22/2026 23:20 (30), 02/27/2026 13:50 (12)
Complete: 🔍
Submitter: Oneafter
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #754589: janet-lang janet 4dd08a4 Heap-based Buffer Overflow (by Oneafter)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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