Publish GHSA-wfq4-36m3-9g42

Author: advisory-database[bot]

advisories/github-reviewed/2026/06/GHSA-wfq4-36m3-9g42/GHSA-wfq4-36m3-9g42.json

@@ -0,0 +1,69 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-wfq4-36m3-9g42",
+  "modified": "2026-06-04T14:47:05Z",
+  "published": "2026-06-04T14:47:05Z",
+  "aliases": [
+    "CVE-2026-45056"
+  ],
+  "summary": "Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution",
+  "details": "### Impact\n\nThe `matrix-sdk-crypto` crate before 0.16.1 is missing a check for the sender's user ID when decrypting an Olm-encrypted to-device message containing the `sender_device_keys` property.\n\nThis could be exploited to spoof the sender of an encrypted to-device message, but only if the attacker colludes with (or is) the homeserver operator.\n\n### Patches\n\nThis issue is fixed in `matrix-sdk-crypto` 0.16.1.\n\n### Workarounds\n\nThere are no known workarounds for the issue.\n\n### References\n\nThis issue was fixed in https://github.com/matrix-org/matrix-rust-sdk/pull/6553.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security at matrix.org](mailto:security@matrix.org).",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "matrix-sdk-crypto"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0.12.0"
+            },
+            {
+              "fixed": "0.16.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-wfq4-36m3-9g42"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6553"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1"
+    },
+    {
+      "type": "WEB",
+      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0159.html"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-290"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-06-04T14:47:05Z",
+    "nvd_published_at": null
+  }
+}