Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck

CVE-2026-112268sglang-router through 0.3.2 Authorization Bypass via Mesh HA Management Routes

Medium 6.3

In plain English

A medium-severity incorrect authorization in sglang-router from sgl-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.3%top 74.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

sglang-router (sgl-model-gateway) through 0.3.2 contains an authorization bypass vulnerability that allows holders of the data-plane API key to access mesh HA management routes because /ha/* endpoints skip control-plane Admin role checks. Attackers can read cluster topology, write gossiped configuration, change global rate limits, and call POST /ha/shutdown to silently dissolve HA coordination.

Affected products (as reported)

Vendor	Product	Versions
sgl-project	sglang-router	0 – through 0.3.2

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References

https://github.com/sgl-project/sglang/issues/45006 issue-tracking
https://github.com/sgl-project/sglang/pull/45017 patch, issue-tracking
https://github.com/sgl-project/sglang/blob/v0.5.22/sgl-model-gateway/src/server.rs#L641-L675 technical-description
VulnCheck Advisory: sglang-router through 0.3.2 Authorization Bypass via Mesh HA Management Routes third-party-advisory