TI-2026-09003 Aliases CVE-2026-10267 GHSA-mmcx-pc5f-m5m4

janet-lang janet debug.c doframe out-of-bounds

MEDIUM 55CWE-119Published 2026-06-01 · Updated 2026-06-01

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

A security flaw has been discovered in janet-lang janet up to 1.41.0. This affects the function doframe of the file src/core/debug.c. Performing a manipulation results in out-of-bounds read. Attacking locally is a requirement. The exploit has been released to the public and may be used for attacks. The patch is named ed17dd2c5913a23fb1107251e44a9410a3c30cf5.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00121 1st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
janet-lang	janet	1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13; 1.14; 1.15; 1.16; 1.17; 1.18; 1.19; 1.20; 1.21; 1.22; 1.23; 1.24; 1.25; 1.26; 1.27; 1.28; 1.29; 1.30; 1.31; 1.32; 1.33; 1.34; 1.35; 1.36; 1.37; 1.38; 1.39; 1.40; 1.41.0	—	No fix listed	CNA

janet Vendorjanet-lang Affected 1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13; 1.14; 1.15; 1.16; 1.17; 1.18; 1.19; 1.20; 1.21; 1.22; 1.23; 1.24; 1.25; 1.26; 1.27; 1.28; 1.29; 1.30; 1.31; 1.32; 1.33; 1.34; 1.35; 1.36; 1.37; 1.38; 1.39; 1.40; 1.41.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:janet-lang:janet::::::::	—	—	janet-lang

cpe:2.3:a:janet-lang:janet:*:*:*:*:*:*:*:* Versions — — ·janet-lang

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-10267
2026-10-03 Alias added: GHSA-mmcx-pc5f-m5m4

References

Exploit 1

https://github.com/biniamf/pocs/tree/main/janet-debug-janet-doframe-env-data-oobread

Patch 1

https://github.com/janet-lang/janet/commit/ed17dd2c5913a23fb1107251e44a9410a3c30cf5

Other 3

TI-2026-09004 janet-lang janet marsh.c unmarshal_one_fiber integer overflow CVSS 4.0MEDIUM 4.8
TI-2026-02464 janet-lang janet handleattr specials.c janetc_varset out-of-bounds CVSS 4.0MEDIUM 4.8
TI-2026-01889 janet-lang janet specials.c janetc_if out-of-bounds CVSS 4.0MEDIUM 4.8
TI-2026-01887 janet-lang janet compile.c janetc_pop_funcdef out-of-bounds CVSS 4.0MEDIUM 4.8
TI-2022-12896 Janet before 1.22.0 mishandles arrays. CVSS 3.1HIGH 7.5
TI-2026-01888 janet-lang janet os.c os_strftime out-of-bounds CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences