{"id":"EUVD-2026-15973","revision":"bf61d30d95e44cfd8cb2f79cf7bc18da","records":[{"revision":"bf61d30d95e44cfd8cb2f79cf7bc18da","observedAt":"2026-11-11T08:36:06.849+00:00","statement":{"source":"euvd","id":"EUVD-2026-15973","aliases":["CVE-2026-33246","GHSA-55h8-8g96-x4hj"],"title":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server offers a `Nats-Request-Info:` message header, providing information about a request. This is supposed to provide enough informat…","description":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server offers a `Nats-Request-Info:` message header, providing information about a request. This is supposed to provide enough information to allow for account/user identification, such that NATS clients could make their own decisions on how to trust a message, provided that they trust the nats-server as a broker. A leafnode connecting to a nats-server is not fully trusted unless the system account is bridged too. Thus identity claims should not have propagated unchecked. Prior to versions 2.11.15 and 2.12.6, NATS clients relying upon the Nats-Request-Info: header could be spoofed. This does not directly affect the nats-server itself, but the CVSS Confidentiality and Integrity scores are based upon what a hypothetical client might choose to do with this NATS header. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","score":6.4,"severity":null}],"references":["https://github.com/nats-io/nats-server/security/advisories/GHSA-55h8-8g96-x4hj","https://advisories.nats.io/CVE/secnote-2026-08.txt"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-15973","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Mar 25, 2026, 7:50:03 PM","dateUpdated":"Mar 28, 2026, 1:42:55 AM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-0858","title":"NATS Server: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-33215","CVE-2026-33216","CVE-2026-33217","CVE-2026-33218","CVE-2026-33219","CVE-2026-33222","CVE-2026-33223","CVE-2026-33246","CVE-2026-33247","CVE-2026-33248","CVE-2026-33249"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-15973","identifiers":["EUVD-2026-15973","CVE-2026-33246","GHSA-55h8-8g96-x4hj"]},"retained":false,"historicalAffected":[]}],"coverage":[]}