{"id":"CVE-2026-46354","summary":"Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft","details":"Coder allows organizations to provision remote development environments via Terraform. In versions prior tp 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3, `azureidentity.Validate()` verifies that the PKCS#7 signer certificate chains to a trusted Azure CA but never verifies the PKCS#7 signature itself. An attacker can embed a legitimate Azure certificate alongside arbitrary content e.g. `{\"vmId\":\"\u003ctarget\u003e\"}` and the forged `vmId` will be accepted returning the victim workspace agent's session token. No authentication is required. The attacker only needs to know a target VM's `vmId` which is a `UUIDv4`. That's a practical limitation which would typically require prior access to be exploited. Versions 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3 patch the issue. As a workaround, reconfigure any Azure templates to use token authentication rather than `azure-instance-identity`.","aliases":["GHSA-6x44-w3xg-hqqf","GO-2026-5196"],"modified":"2026-07-31T18:30:50.417451741Z","published":"2026-07-07T21:10:01.899Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46354.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-347"]},"references":[{"type":"WEB","url":"https://github.com/coder/coder/releases/tag/v2.24.5"},{"type":"WEB","url":"https://github.com/coder/coder/releases/tag/v2.29.13"},{"type":"WEB","url":"https://github.com/coder/coder/releases/tag/v2.30.8"},{"type":"WEB","url":"https://github.com/coder/coder/releases/tag/v2.31.12"},{"type":"WEB","url":"https://github.com/coder/coder/releases/tag/v2.32.2"},{"type":"WEB","url":"https://github.com/coder/coder/releases/tag/v2.33.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46354.json"},{"type":"ADVISORY","url":"https://github.com/coder/coder/security/advisories/GHSA-6x44-w3xg-hqqf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46354"},{"type":"FIX","url":"https://github.com/coder/coder/pull/25286"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/coder/coder","events":[{"introduced":"0"},{"fixed":"cc4907395be7cfd58f3cb19fe1b97f38730bfeec"},{"introduced":"ba71b321bceab3faa128d306e8de3612a673d6c1"},{"fixed":"25ddc1cb787ae88af6040590f676b3d31a63e225"},{"introduced":"43e67d12e278e13399cffc77f132e8e628339477"},{"fixed":"74eba1e8a9f98fddd782b9123241b53510f3c8c9"},{"introduced":"fa050ee0abc24ddf1bf91fb26148a9c3b2bd1481"},{"fixed":"dfe986b2b051a962e8035b0941f5adf312b3926c"},{"introduced":"34584e909bbe6f501fb2cbdc994325b4d3f9e2ef"},{"fixed":"5f343bc337b413aeee8ef2d47004ef97196607c1"},{"introduced":"f009c17217e6bad9a61ba511d23735bc1ce94da0"},{"fixed":"2b778f292c2ddf8ac261683d0d5d8a18da1512f6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.24.5"},{"introduced":"2.29.0"},{"fixed":"2.29.13"},{"introduced":"2.30.0"},{"fixed":"2.30.8"},{"introduced":"2.31.0"},{"fixed":"2.31.12"},{"introduced":"2.32.0"},{"fixed":"2.32.2"},{"introduced":"2.33.0"},{"fixed":"2.33.3"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*"}}],"versions":["v2.24.4","v2.29.12","v2.33.2","v2.32.1","v2.31.11","v2.33.1","v2.33.0","v2.31.10","v2.29.11","v2.29.10","v2.31.9","v2.30.7","v2.32.0","v2.30.6","v2.31.8","v2.31.7","v2.29.9","v2.30.5","v2.31.6","v2.31.5","v2.30.4","v2.29.8","v2.30.3","list","describe","v2.31.4","v2.31.3","v2.31.2","v2.31.1","v2.31.0","v2.30.2","v2.29.7","v2.29.6","v2.29.5","v2.29.4","v2.29.3","v2.29.2","v2.29.1","v2.29.0","v2.24.3","v2.24.2","v2.24.1","v2.24.0","v2.10.0","v2.9.0","v2.6.0","v2.8.0","v2.7.1","v2.7.0","v2.5.1","v2.5.0","v2.4.0","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.1","v2.1.5","v2.1.4","v2.1.3","v2.1.2","v2.1.1","v2.0.2","v0.27.1","v0.27.0","v0.26.2","v0.26.1","v0.26.0","v0.25.0","v0.24.1","v0.24.0","v0.23.7","v0.23.6","v0.23.5","v0.23.4","v0.23.3","v0.23.2","v0.23.1","v0.23.0","v0.22.2","v0.22.1","v0.22.0","v0.21.3","v0.21.2","v0.21.1","v0.21.0","v0.20.1","v0.20.0","v0.19.2","v0.19.1","v0.19.0","v0.18.1","v0.18.0","v0.17.4","v0.17.3","v0.17.2","v0.17.1","v0.17.0","v0.16.0","v0.15.3","v0.15.2","v0.15.1","v0.15.0","v0.14.3","v0.14.2","v0.14.1","v0.14.0","v0.13.6","v0.13.5","v0.13.4","v0.13.3","v0.13.2","v0.13.1","v0.13.0","v0.12.9","v0.12.8","v0.12.7","v0.12.6","v0.12.5","v0.12.4","v0.12.3","v0.12.2","v0.12.1","v0.12.0","v0.11.0","v0.10.2","v0.10.1","v0.10.0","rm","v0.9.10","v0.9.9","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.15","v0.8.14","v0.8.13","v0.8.12","v0.8.11","v0.8.10","v0.8.9","v0.8.8","v0.8.7","v0.8.6","v0.8.5","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.12","v0.7.11","v0.7.10","v0.7.9","v0.7.8","v0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.6","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.11","v0.5.10","v0.5.9","v0.5.8","v0.5.7","v0.5.6","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46354.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}