PT-2026-7124 · Unknown · Janet-Lang

Oneafter · Published 2026-02-09 · Updated 2026-02-09 · CVE-2026-2242

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Name of the Vulnerable Software and Affected Versions janet-lang versions prior to 1.40.1

Description A flaw exists in janet-lang that could lead to an out-of-bounds read. This issue is related to the janetc if function within the src/core/specials.c file. The issue can be triggered locally through a manipulation of the software. The exploit has been publicly disclosed.

Recommendations Apply the patch c43e06672cd9dacf2122c99f362120a17c34b391 to correct this issue.

Exploit

Fix

Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-119

CWE-125

Related Identifiers

CVE-2026-2242

Affected Products

Janet-Lang

References · 13

• 🔥 https://github.com/janet-lang/janet/issues/1700 · Exploit
• 🔥 https://github.com/janet-lang/janet/issues/1702 · Exploit
• 🔥 https://github.com/oneafter/0123/blob/main/ja2/repro · Exploit
• https://github.com/janet-lang/janet/commit/c43e06672cd9dacf2122c99f362120a17c34b391 · Patch
• https://osv.dev/vulnerability/CVE-2026-2242 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2242 · Security Note
• https://twitter.com/CVEnew/status/2020917407787720962 · Twitter Post
• https://t.me/CVEtracker/44225 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2020948064710574555 · Twitter Post
• https://vuldb.com/?submit.754495 · Note
• https://vuldb.com/?id.344981 · Note
• https://vuldb.com/?ctiid.344981 · Note
• https://github.com/janet-lang/janet · Note