CVE-2026-59279

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Source

https://cve.org/CVERecord?id=CVE-2026-59279

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59279.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-59279

Published

2026-08-21T12:07:05Z

Modified

2026-09-18T03:48:30Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Unbounded persistent session allocation via repeated initialize requests

Details

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

Database specific

{
    "cna_assigner":  "vmware",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59279.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "2.0.0"
                },
                {
                    "last_affected":  "2.0.0"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/spring-projects/spring-ai

Affected ranges

Type

GIT

Repo

https://github.com/spring-projects/spring-ai

Events

Introduced

ef502dab692e26b953a75be4029dba7f1acdc88c

Fixed

c9107fdac0a6c88489c08bb88abcee74c146981d

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:vmware:spring_ai:*:-:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "2.0.0"
        },
        {
            "fixed":  "2.0.1"
        }
    ],
    "source":  "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59279.json"