{"id":"GHSA-8m2x-3m6q-6w8j","revision":null,"records":[{"revision":"6c048f106cf441569f72b5645fe7523f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-33249","aliases":[],"title":"NATS: Message tracing can be redirected to arbitrary subject","description":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the trace messages can be sent to an arbitrary valid subject, including those to which the client does not have publish permission. The payload is a valid trace message and not chosen by the attacker. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.","state":0,"publishedAt":"2026-03-25T20:21:30.156+00:00","modifiedAt":"2026-03-26T19:52:12.206+00:00","affected":[{"ecosystem":"Vendor product","name":"nats-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nats-io\",\n                    \"product\": \"nats-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.11.0, < 2.11.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2.12.0-preview.1, < 2.12.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/nats-io/nats-server/security/advisories/GHSA-8m2x-3m6q-6w8j","https://advisories.nats.io/CVE/secnote-2026-15.txt"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-33249","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-33249","identifiers":["CVE-2026-33249"]},"retained":false,"historicalAffected":[]},{"revision":"951fe11951af407aa230aea8fc3e277b","observedAt":"2026-11-15T10:02:42.613+00:00","statement":{"source":"euvd","id":"EUVD-2026-16000","aliases":["CVE-2026-33249","GHSA-8m2x-3m6q-6w8j"],"title":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the tra…","description":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the trace messages can be sent to an arbitrary valid subject, including those to which the client does not have publish permission. The payload is a valid trace message and not chosen by the attacker. 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:U/C:N/I:L/A:N","score":4.3,"severity":null}],"references":["https://github.com/nats-io/nats-server/security/advisories/GHSA-8m2x-3m6q-6w8j","https://advisories.nats.io/CVE/secnote-2026-15.txt"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-16000","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Mar 25, 2026, 8:21:30 PM","dateUpdated":"Mar 26, 2026, 7:52:12 PM"},"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-2026-16000","identifiers":["EUVD-2026-16000","CVE-2026-33249","GHSA-8m2x-3m6q-6w8j"]},"retained":false,"historicalAffected":[]},{"revision":"a79fca56cbf64743a6f51ca51e552bfa","observedAt":"2026-10-25T08:17:18.375+00:00","statement":{"source":"nvd","id":"CVE-2026-33249","aliases":[],"title":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the tra…","description":"NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the trace messages can be sent to an arbitrary valid subject, including those to which the client does not have publish permission. The payload is a valid trace message and not chosen by the attacker. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.","state":0,"publishedAt":"2026-03-25T21:16:47.737+00:00","modifiedAt":"2026-06-17T10:37:11.48+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://advisories.nats.io/CVE/secnote-2026-15.txt","https://github.com/nats-io/nats-server/security/advisories/GHSA-8m2x-3m6q-6w8j"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-33249","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-863"],"productCriteria":["cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-03-25T21:16:47.737","lastModified":"2026-06-17T10:37:11.480"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-33249","identifiers":["CVE-2026-33249"]},"retained":false,"historicalAffected":[]},{"revision":"b4dc960fcdc544b8b37075f9720c8a1a","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-8m2x-3m6q-6w8j","aliases":["BIT-nats-2026-33249","CVE-2026-33249","GO-2026-4826"],"title":"NATS: Message tracing can be redirected to arbitrary subject","description":"### Background\n\nNATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.\n\nThe nats-server supports telemetry on messages, using the per-message NATS headers.\n\n### Problem Description\n\nA valid client which uses message tracing headers can indicate that the trace messages can be sent to an arbitrary valid subject, including those to which the client does not have publish permission.\n\nThe payload is a valid trace message and not chosen by the attacker.\n\n### Affected Versions\n\nAny version before v2.12.6 or v2.11.15\n\n### Workarounds\n\nNone.","state":0,"publishedAt":"2026-03-24T20:37:08+00:00","modifiedAt":"2026-09-10T03:50:38.2436019+00:00","affected":[{"ecosystem":"Go","name":"github.com/nats-io/nats-server/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.11.0"},{"kind":"fixed","version":"2.11.15"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/nats-io/nats-server/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.12.0-preview.1"},{"kind":"fixed","version":"2.12.6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/nats-io/nats-server/security/advisories/GHSA-8m2x-3m6q-6w8j","https://nvd.nist.gov/vuln/detail/CVE-2026-33249","https://advisories.nats.io/CVE/secnote-2026-15.txt","https://github.com/nats-io/nats-server"],"sourceUrl":"https://github.com/advisories/GHSA-8m2x-3m6q-6w8j","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-8m2x-3m6q-6w8j","identifiers":["GHSA-8m2x-3m6q-6w8j","BIT-nats-2026-33249","CVE-2026-33249","GO-2026-4826"]},"retained":false,"historicalAffected":[]},{"revision":"3d3d48f741d44710be7da00736dab436","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-4826","aliases":["BIT-nats-2026-33249","CVE-2026-33249","GHSA-8m2x-3m6q-6w8j"],"title":"NATS: Message tracing can be redirected to arbitrary subject in github.com/nats-io/nats-server","description":"NATS: Message tracing can be redirected to arbitrary subject in github.com/nats-io/nats-server","state":0,"publishedAt":"2026-03-26T20:33:02+00:00","modifiedAt":"2026-03-30T12:26:02.943661+00:00","affected":[{"ecosystem":"Go","name":"github.com/nats-io/nats-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/nats-io/nats-server/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.11.0"},{"kind":"fixed","version":"2.11.15"},{"kind":"introduced","version":"2.12.0-preview.1"},{"kind":"fixed","version":"2.12.6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/nats-io/nats-server/security/advisories/GHSA-8m2x-3m6q-6w8j","https://nvd.nist.gov/vuln/detail/CVE-2026-33249","https://advisories.nats.io/CVE/secnote-2026-15.txt"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-4826","license":"OSV · upstream source license applies","key":"osv:GO-2026-4826","identifiers":["GO-2026-4826","BIT-nats-2026-33249","CVE-2026-33249","GHSA-8m2x-3m6q-6w8j"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-15T11:05:17.2943378+00:00","complete":true,"records":1781,"lastAttemptAt":"2026-11-15T11:05:17.2943378+00:00","lastSuccessAt":"2026-11-15T11:05:17.4673918+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:05:17.4673928+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-7de4d7559a5263003f03d9f70577ab06f92ba4178309f26fce53e22a4a959294-f90179050d1e68c26defb06294e68ca9aad67fa6285a72a309f2510089445b08","complete":true,"records":425787,"lastAttemptAt":"2026-11-15T11:01:58.8542146+00:00","lastSuccessAt":"2026-11-15T11:01:58.8389797+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:01:58.8542146+00:00","snapshotPublishedAt":"2026-11-15T10:28:09+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-f981543109394c8f9b3df5737aa835e7","complete":false,"records":13821,"lastAttemptAt":"2026-11-15T11:15:00.6236179+00:00","lastSuccessAt":"2026-11-15T11:15:00.619+00:00","error":"257 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-15T11:15:00.619+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13558,"expectedIdentifiers":13874,"failedIdentifiers":257},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-15T11:05:17.2943378+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T11:05:17.2943378+00:00","lastSuccessAt":"2026-11-15T11:05:17.4693563+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:05:17.4693566+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-d33b5144615b488f88b7a7390696bc39","complete":true,"records":13833,"lastAttemptAt":"2026-11-15T11:05:18.0594066+00:00","lastSuccessAt":"2026-11-15T10:02:36.038+00:00","error":null,"lastVerifiedAt":"2026-11-15T10:02:36.038+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13874,"expectedIdentifiers":13874,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-64eea06dbd27de8464d5dbce1b78cc794cc59e2d901516ae0d3ea76e624cdae0","complete":true,"records":9955,"lastAttemptAt":"2026-11-15T11:05:12.198625+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:05:12.198625+00:00","snapshotPublishedAt":"2026-11-14T13:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-f4424d7d4861b1af1404bd15abcb83f295dcd003412a9340ca99dc8200aa148a","complete":true,"records":2014,"lastAttemptAt":"2026-11-15T11:01:59.0034935+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:01:59.0034935+00:00","snapshotPublishedAt":"2026-11-13T19:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-6086d649bcb454cdf302d7d9275177bda73550e1b6e446b3520e9b6266d3582c","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T11:05:17.2566792+00:00","lastSuccessAt":"2026-11-15T11:05:17.1034234+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:05:17.2566792+00:00","snapshotPublishedAt":"2026-11-15T10:03:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-ff18f36f13fcca3a20a3fb9274b59b8872d18869a99071730e1e79b625c8f612","complete":true,"records":232475,"lastAttemptAt":"2026-11-15T11:05:12.0533004+00:00","lastSuccessAt":"2026-11-15T11:05:10.4195883+00:00","error":null,"lastVerifiedAt":"2026-11-15T11:05:12.0533004+00:00","snapshotPublishedAt":"2026-11-15T10:33:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}