Publish GHSA-h97m-27fx-42rx

Author: advisory-database[bot]

advisories/github-reviewed/2026/06/GHSA-h97m-27fx-42rx/GHSA-h97m-27fx-42rx.json

@@ -0,0 +1,69 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-h97m-27fx-42rx",
+  "modified": "2026-06-04T14:50:47Z",
+  "published": "2026-06-04T14:50:47Z",
+  "aliases": [
+    "CVE-2026-45057"
+  ],
+  "summary": "matrix-sdk-ui: Incomplete edit validation",
+  "details": "### Impact\nThe message edit validation logic in the  `matrix-sdk-ui` crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator (or an actor with equivalent power) to impersonate or spoof messages as if they were sent by a victim user.\n\n### Patches\n`matrix-sdk-ui` 0.16.1 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification.\n\n### Workarounds\nN/A\n\n### References\n* Pull request: https://github.com/matrix-org/matrix-rust-sdk/pull/6454\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at [security at matrix.org](mailto:security@matrix.org).\n\n[^1]: https://spec.matrix.org/unstable/client-server-api/#validity-of-replacement-events",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "matrix-sdk-ui"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "0.16.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454"
+    },
+    {
+      "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-2026-0158.html"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-345"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-06-04T14:50:47Z",
+    "nvd_published_at": null
+  }
+}