Medium severity · published Aug 21, 2026
CVE-2026-59308
Semantic Cache Cross-Tenant Isolation Bypass via SHA-256 Truncation
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
In Spring AI's Semantic Cache support, the context hash used to isolate cached responses between different system prompts could allow cached responses to be shared across unrelated contexts.
Affected versions:
Spring AI: 2.0.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SA
Spring AI · Spring
2.0.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59308
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59308
Vendor Advisory
https://spring.io/security/cve-2026-59308
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