CVE-2026-111392
CVE-2026-111392 · SGLang through 0.5.21 KV Cache Poisoning via mm_hashes in /generate
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.3 · Medium · EPSS 0.2%
- Published
- Updated
Affected products and versions
sglang
- Versions
- ≥ 0.5.13, ≤ 0.5.21: Affected (custom)
No fix published
Original sources
- https://github.com/sgl-project/sglang/issues/44641
- https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/managers/tokenizer_manager.py#L1183-L1215
- https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/managers/io_struct.py#L205-L215
- https://github.com/sgl-project/sglang/pull/44653
- https://www.vulncheck.com/advisories/sglang-through-0.5.21-kv-cache-poisoning-via-mm-hashes-in-generate
- https://nvd.nist.gov/vuln/detail/CVE-2026-111392