{"id":"GHSA-5p54-whvp-x327","revision":null,"records":[{"revision":"26a03c4cac9948999ad9cd72549322eb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63405","aliases":[],"title":"AnyCable: Pusher REST API Does Not Verify Request Body MD5 Enabling Signed-Request Replay with Arbitrary Body","description":"AnyCable is a realtime server for reliable two-way communication that supports any backend. Prior to 1.6.15, the Pusher-compatible REST API in pusher/http.go includes the caller-supplied body_md5 value in the HMAC input but does not calculate the digest of the received request body or compare it with the signed value. An attacker who obtains a legitimate signed POST request can retain its query parameters and auth_signature while replacing the body, causing Handler and handleEvents to accept and broadcast attacker-selected event content. The absence of an auth_timestamp freshness check also allows the captured signature to be replayed indefinitely. This can forge server-side events, modify application state, or deliver attacker-controlled messages to WebSocket clients within the signed request's application context. This issue is fixed in version 1.6.15.","state":0,"publishedAt":"2026-09-18T16:47:37.12+00:00","modifiedAt":"2026-09-18T17:07:38.72+00:00","affected":[{"ecosystem":"Vendor product","name":"anycable","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"anycable\",\n                    \"product\": \"anycable\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.6.15\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/anycable/anycable/security/advisories/GHSA-5p54-whvp-x327","https://github.com/anycable/anycable/commit/d2cbadec792f038f4695c84a65c0d957b0fde72c","https://github.com/anycable/anycable/releases/tag/v1.6.15"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63405","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63405","identifiers":["CVE-2026-63405"]},"retained":false,"historicalAffected":[]},{"revision":"8f1082ec307940049f488ff3743320e6","observedAt":"2026-11-11T15:06:06.204+00:00","statement":{"source":"euvd","id":"EUVD-2026-83180","aliases":["CVE-2026-63405","GHSA-5p54-whvp-x327"],"title":"AnyCable is a realtime server for reliable two-way communication that supports any backend. Prior to 1.6.15, the Pusher-compatible REST API in pusher/http.go includes the caller-supplied body_md5 value in the HMAC input but does not calcula…","description":"AnyCable is a realtime server for reliable two-way communication that supports any backend. Prior to 1.6.15, the Pusher-compatible REST API in pusher/http.go includes the caller-supplied body_md5 value in the HMAC input but does not calculate the digest of the received request body or compare it with the signed value. An attacker who obtains a legitimate signed POST request can retain its query parameters and auth_signature while replacing the body, causing Handler and handleEvents to accept and broadcast attacker-selected event content. The absence of an auth_timestamp freshness check also allows the captured signature to be replayed indefinitely. This can forge server-side events, modify application state, or deliver attacker-controlled messages to WebSocket clients within the signed request's application context. This issue is fixed in version 1.6.15.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":5.9,"severity":null}],"references":["https://github.com/anycable/anycable/security/advisories/GHSA-5p54-whvp-x327","https://github.com/anycable/anycable/commit/d2cbadec792f038f4695c84a65c0d957b0fde72c","https://github.com/anycable/anycable/releases/tag/v1.6.15"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83180","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 18, 2026, 4:47:37 PM","dateUpdated":"Sep 18, 2026, 5:07:38 PM"},"relatedAdvisories":[],"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-2026-83180","identifiers":["EUVD-2026-83180","CVE-2026-63405","GHSA-5p54-whvp-x327"]},"retained":false,"historicalAffected":[]},{"revision":"7876c97afc8d462cbb263ca4944d968d","observedAt":"2026-10-25T15:18:45.851+00:00","statement":{"source":"nvd","id":"CVE-2026-63405","aliases":[],"title":"AnyCable is a realtime server for reliable two-way communication that supports any backend. Prior to 1.6.15, the Pusher-compatible REST API in pusher/http.go includes the caller-supplied body_md5 value in the HMAC input but does not calcula…","description":"AnyCable is a realtime server for reliable two-way communication that supports any backend. Prior to 1.6.15, the Pusher-compatible REST API in pusher/http.go includes the caller-supplied body_md5 value in the HMAC input but does not calculate the digest of the received request body or compare it with the signed value. An attacker who obtains a legitimate signed POST request can retain its query parameters and auth_signature while replacing the body, causing Handler and handleEvents to accept and broadcast attacker-selected event content. The absence of an auth_timestamp freshness check also allows the captured signature to be replayed indefinitely. This can forge server-side events, modify application state, or deliver attacker-controlled messages to WebSocket clients within the signed request's application context. This issue is fixed in version 1.6.15.","state":0,"publishedAt":"2026-09-18T17:16:59.463+00:00","modifiedAt":"2026-09-24T21:25:27.05+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/anycable/anycable/commit/d2cbadec792f038f4695c84a65c0d957b0fde72c","https://github.com/anycable/anycable/releases/tag/v1.6.15","https://github.com/anycable/anycable/security/advisories/GHSA-5p54-whvp-x327"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63405","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-345"],"productCriteria":[],"sourceDates":{"published":"2026-09-18T17:16:59.463","lastModified":"2026-09-24T21:25:27.050"},"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-2026-63405","identifiers":["CVE-2026-63405"]},"retained":false,"historicalAffected":[]},{"revision":"96a4caf56f594b4cb6d1ccdd5510106a","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-5p54-whvp-x327","aliases":["CVE-2026-63405","GO-2026-6516"],"title":"AnyCable: Pusher REST API Does Not Verify Request Body MD5 Enabling Signed-Request Replay with Arbitrary Body","description":"### Summary\nThe Pusher-compatible REST API includes `body_md5` in the HMAC signature string but never computes or verifies the MD5 of the received HTTP body, allowing anyone who observes a signed request to replay it with an entirely different body.\n\n### Details\nIn `pusher/http.go`, the `Handler` function extracts `body_md5` from the URL query string (line 169) and includes it verbatim in `stringToSign` (line 175). It then verifies `HMAC(stringToSign, secret) == auth_signature`. After verification succeeds, `handleEvents` reads and parses `r.Body` (lines 201-212) without ever computing `md5(body)` and comparing it against the `body_md5` that was signed. The Pusher protocol specification explicitly requires the server to verify this digest to prevent body-substitution attacks. There is also no `auth_timestamp` staleness check, so replays are valid indefinitely.\n\n### PoC\n1. Capture a legitimate signed POST to `/apps/<app_id>/events?auth_key=K&auth_timestamp=T&auth_version=1.0&body_md5=LEGIT_MD5&auth_signature=SIG` carrying body `{\"name\":\"safe-event\",\"channel\":\"ch\",\"data\":\"...\"}` (e.g., from TLS-terminating load-balancer logs).\n2. Send a new request with the same query string parameters but a different body:\n   `{\"name\":\"injected-event\",\"channel\":\"admin\",\"data\":\"malicious-payload\"}`\n3. The server accepts the request (HMAC over `stringToSign` matches the original) and broadcasts the injected event to all subscribers of `admin`.\n\n### Impact\nAn attacker who can read any single signed Pusher API request (from logs, a shared proxy, or a network tap) can broadcast arbitrary events to any channel indefinitely, potentially forging server-side events, corrupting application state, or delivering phishing messages to WebSocket clients.\n\n### Fix\nAfter reading `r.Body`, compute `hex(md5(body))` and compare it to the `body_md5` query parameter using a constant-time comparison before proceeding. Additionally, reject requests whose `auth_timestamp` is more than 600 seconds from the current time.","state":0,"publishedAt":"2026-09-18T17:16:25+00:00","modifiedAt":"2026-09-28T17:10:52.6358227+00:00","affected":[{"ecosystem":"Go","name":"github.com/anycable/anycable","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.6.15"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/anycable/anycable/security/advisories/GHSA-5p54-whvp-x327","https://github.com/anycable/anycable/commit/d2cbadec792f038f4695c84a65c0d957b0fde72c","https://github.com/anycable/anycable","https://github.com/anycable/anycable/releases/tag/v1.6.15"],"sourceUrl":"https://github.com/advisories/GHSA-5p54-whvp-x327","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-5p54-whvp-x327","identifiers":["GHSA-5p54-whvp-x327","CVE-2026-63405","GO-2026-6516"]},"retained":false,"historicalAffected":[]},{"revision":"6c55b03efdba4758afc5be0fe03ecf71","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6516","aliases":["CVE-2026-63405","GHSA-5p54-whvp-x327"],"title":"AnyCable: Pusher REST API Does Not Verify Request Body MD5 Enabling Signed-Request Replay with Arbitrary Body in github.com/anycable/anycable-go","description":"AnyCable: Pusher REST API Does Not Verify Request Body MD5 Enabling Signed-Request Replay with Arbitrary Body in github.com/anycable/anycable-go.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/anycable/anycable-go before v1.6.15.","state":0,"publishedAt":"2026-09-28T16:43:40+00:00","modifiedAt":"2026-09-28T17:00:16.3612697+00:00","affected":[{"ecosystem":"Go","name":"github.com/anycable/anycable-go","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/anycable/anycable/security/advisories/GHSA-5p54-whvp-x327","https://github.com/anycable/anycable/commit/d2cbadec792f038f4695c84a65c0d957b0fde72c","https://github.com/anycable/anycable/releases/tag/v1.6.15"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6516","license":"OSV · upstream source license applies","key":"osv:GO-2026-6516","identifiers":["GO-2026-6516","CVE-2026-63405","GHSA-5p54-whvp-x327"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-12T07:54:58.2349119+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T07:54:58.2349119+00:00","lastSuccessAt":"2026-11-12T07:54:58.4862124+00:00","error":null,"lastVerifiedAt":"2026-11-12T07:54:58.4862143+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. 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