CVE-2026-109153CWE-22path-traversal

CVE-2026-109153

Medium · published October 13, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
41.4
In the wild
Unconfirmed
What it is

A vulnerability was detected in MosaicML Composer up to 0.32.1. This affects the function tarball.extractall of the file composer/utils/checkpoint.py of the component Checkpoint Extraction. The manipulation results in path traversal. The attack can be executed remotely. The vendor was contacted early about this disclosure.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
EPSS
0.00493 · 41.4th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-13T15:17Z
References (6)
https://github.com/mosaicml/composer/ · [email protected]https://github.com/mosaicml/composer/issues/3942 · [email protected]https://vuldb.com/cve/CVE-2026-109153 · [email protected]https://vuldb.com/submit/978647 · [email protected]https://vuldb.com/vuln/416887 · [email protected]https://vuldb.com/vuln/416887/cti · [email protected]
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 10:00Z
    MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal
    cvelistv5
  • 13 OCT 10:00Z
    MosaicML Composer Checkpoint Extraction checkpoint.py tarball.extractall path traversal
    cvelistv5