Use of a Broken or Risky Cryptographic Algorithm Affecting org.springframework.ai:spring-ai-redis-semantic-cache package, versions [2.0.0,2.0.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published23 Aug 2026
- disclosed21 Aug 2026
- creditWayde Shi
Introduced: 21 Aug 2026
NewCVE-2026-59308 (opens in a new tab)How to fix?
Upgrade org.springframework.ai:spring-ai-redis-semantic-cache to version 2.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Use of a Broken or Risky Cryptographic Algorithm due to the extractContextHash logic in SemanticCacheAdvisor.java. An attacker can receive cached responses from an unrelated system prompt by sending requests whose prompts collide under the truncated context hash. The cache uses only the first 8 hex characters of a SHA-256 digest to identify the system prompt context, so different prompts can map to the same context_hash. This breaks semantic cache isolation and can return another context’s cached answer to a user whose request should have been handled separately.