Vulnerability · Published Oct 23, 2026 · Assigned by AMZN

CVE-2026-115812Relative path traversal during model archive extraction in Amazon Web Services Multi Model Server

Critical 9.8

In plain English

A critical-severity security flaw in multi-model-server from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 55.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
AWS	multi-model-server	0 – through 1.1.11

Weakness: CWE-23 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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