Read the docs
TI-2026-42412 Aliases CVE-2026-59279GHSA-2g9x-r8w8-qjff

Unbounded persistent session allocation via repeated initialize requests

Priority MEDIUM 40CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

The MCP Streamable HTTP server transport (WebFlux and WebMvc variants) does not place any limit on the number of sessions it retains, and by default does not require clients to be authenticated. As a result, a remote attacker can cause the server to accumulate an unbounded number of sessions over time, gradually exhausting available memory and ultimately causing a Denial of Service that affects all legitimate clients. Affected versions: Spring AI: 2.0.0

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00549 46th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
VMwareSpring AI2.0.0—No fix listedCNA
  • Spring AI VendorVMware Affected 2.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vmware:spring_ai:*:-:*:*:*:*:*:*2.0.0 to before 2.0.1VulnerableVMware
  • cpe:2.3:a:vmware:spring_ai:*:-:*:*:*:*:*:* Versions 2.0.0 to before 2.0.1 Vulnerable ·VMware

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59279
  2. 2026-10-03 Alias added: GHSA-2g9x-r8w8-qjff

References

Advisory 1

  • TI-2026-18262 SpEL Injection via Unescaped Filter Key in SimpleVectorStore Leads to Remote Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2026-29618 Code injection in VMware Spring AI CVSS 3.1HIGH 8.6
  • TI-2026-18254 CVE-2026-22729: JSONPath Injection in Spring AI Vector Stores FilterExpressionConverter CVSS 3.1HIGH 8.6
  • TI-2026-35287 Spring AI vector store metadata filtering to handle special characters in Elasticsearch… CVSS 3.1HIGH 8.6
  • TI-2026-30221 Expression language injection in VMware Spring AI CVSS 3.1HIGH 8.6
  • TI-2026-18266 Server-Side Request Forgery in BedrockProxyChatModel via Unvalidated Media URL Fetching CVSS 3.1HIGH 8.6
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences