CVE-2026-40966 json
VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration
published 6mo ago modified 14d ago also GHSA-v6x6-pjxw-3pv2 , EUVD-2026-26002
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
In Spring AI, an attacker can bypass conversation isolation and exfiltrate sensitive memory from other users’ chat histories, including secrets and credentials, by injecting filter logic through conversationId. Only applications that use VectorStoreChatMemoryAdvisor and pass user-supplied input as a conversationId are affected.
Patch / fix
- maven org.springframework.ai:spring-ai-advisors-vector-store 1.0.6, 1.1.5
- VMware Spring AI 1.0.6, 1.1.5
Is CVE-2026-40966 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.springframework.ai:spring-ai-advisors-vector-store | >=1.0.0, <1.0.6 >=1.1.0, <1.1.5 |
1.0.6 1.1.5 |
Affected products
- VMware Spring AI
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
spring.io
/security/cve-2026-40966
web, vendor-advisory
-
nvd.nist.gov
/vuln-metrics/cvss/v3-calculator?version=3.1&vector=AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
web, us-government-resource
-
nvd.nist.gov
/vuln/detail/CVE-2026-40966
advisory
-
github.com
/spring-projects/spring-ai
package
-
jinyeong.seol.pro
/blogs/cve-2026-40966/en
web
Sources
- CVE List CVE-2026-40966
- GitHub Advisory GHSA-v6x6-pjxw-3pv2
- NVD CVE-2026-40966
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