CVE-2026-111392
SGLang through 0.5.21 KV Cache Poisoning via mm_hashes in /generate
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-345 |
| Vendor | sgl-project |
| Product | sglang |
| Published | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
sgl-project / sglang
0.5.13 ≤ 0.5.21
References
github.com: https://github.com/sgl-project/sglang/issues/44641 github.com: https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/managers/tokenizer_manager.py#L1183-L1215 github.com: https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/managers/io_struct.py#L205-L215 github.com: https://github.com/sgl-project/sglang/pull/44653 vulncheck.com: https://www.vulncheck.com/advisories/sglang-through-0.5.21-kv-cache-poisoning-via-mm-hashes-in-generate
Credits
Mingkai Yu Jiadai Wang Jiajia Liu