janet-lang janet up to 1.40.1 src/core/os.c os_strftime out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability was found in janet-lang janet up to 1.40.1. It has been declared as problematic. This impacts the function os_strftime of the file src/core/os.c. Executing a manipulation can lead to out-of-bounds. This vulnerability is registered as CVE-2026-2241. The attack needs to be launched locally. Furthermore, an exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as problematic was found in janet-lang janet up to 1.40.1. This vulnerability affects the function os_strftime of the file src/core/os.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-2241. The exploitation appears to be easy. The attack needs to be approached locally. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch 0f285855f0e34f9183956be5f16e045f54626bff is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

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: 4.2
VulDB Meta Temp Score: 4.1

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

NVD Base Score: 6.1
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: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 0f285855f0e34f9183956be5f16e045f54626bff

Timelineinfo

02/09/2026 Advisory disclosed
02/09/2026 +0 days VulDB entry created
02/26/2026 +17 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1701
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-2241 (🔒)
GCVE (CVE): GCVE-0-2026-2241
GCVE (VulDB): GCVE-100-344980
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/09/2026 10:43
Updated: 02/26/2026 13:51
Changes: 02/09/2026 10:43 (60), 02/09/2026 19:34 (30), 02/26/2026 13:51 (12)
Complete: 🔍
Submitter: Oneafter
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #753156: janet-lang janet c43e066 Heap-based Buffer Overflow (by Oneafter)

Once again VulDB remains the best source for vulnerability data.

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