Public vulnerability disclosure

CVE-2026-115812

Relative path traversal during model archive extraction in Amazon Web Services Multi Model Server

publishedCWE-23

Relative path traversal during model archive extraction in Amazon Web Services Multi Model Server 1.1.11 and earlier might allow remote actors to execute arbitrary code via a crafted model archive. Multi Model Server is end of life and no fixed version is available. Users should discontinue use of Multi Model Server and migrate to a supported model serving solution.

Investigate in Cyber JSON Markdown

Technical severity9.8 criticalCVSS 3.1 · CNA: AMZN

Published2026-10-23Source updated 2026-11-02

Collected2026-11-022 attributed sources

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
multi-model-server AWS	≥ 0; ≤ 1.1.11 (affected, custom) Other versions: unaffected	CNA: AMZN

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 9.8 critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`	CNA: AMZN
4.0 / 9.3 critical	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`	CNA: AMZN

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://aws.amazon.com/security/security-bulletins/2026-148-aws/CNA: AMZN · vendor-advisory