CVE-2026-111392 SGLang through 0.5.21 KV Cache Poisoning via mm_hashes in /generate
Remote attackers can poison KV cache entries in SGLang to disclose other users' image content or corrupt responses via the /generate endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111392?
CVE-2026-111392 is a medium-severity vulnerability in sgl-project sglang, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SGLang through 0.5.21 trusts caller-supplied mm_hashes values as the multimodal prefix-cache key, allowing remote attackers to poison cached KV entries across requests. Attackers can send a different image under a known or predicted hash via /generate to disclose another request's image content or corrupt victims' responses.
Weakness: CWE-345
Which versions are affected by CVE-2026-111392?
How do I fix CVE-2026-111392?
No fix has been published for CVE-2026-111392 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111392 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111392 exists.
Sources
Also known as GHSA-fgff-m398-2gh5.