{"answers":{"affected":"3 open source packages ship an affected version, including matrix-sdk-ui.","exploited":"There is no known exploitation of CVE-2026-45057 in the wild and no public exploit code.","fix":"Upgrade matrix-sdk-ui to 0.16.1 or later.","what":"CVE-2026-45057 is a medium-severity missing authorization vulnerability in matrix-org matrix-sdk-ui, published on 11 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-45057 and fix it if it is affected.\n\nWhat it is: CVE-2026-45057 is a medium-severity missing authorization vulnerability in matrix-org matrix-sdk-ui, published on 11 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-45057 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- matrix-sdk-ui (crates.io): affected all versions; fixed in 0.16.1\n- matrix-sdk-ui (crates.io): affected all versions; fixed in 0.16.1\n- matrix-sdk-ui (crates.io): affected from 0.0.0-0; fixed in 0.16.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-45057/ (Markdown: https://insights.sbomify.com/CVE-2026-45057/index.md)","id":"CVE-2026-45057","markdown":"https://insights.sbomify.com/CVE-2026-45057/index.md","name":"CVE-2026-45057","record":{"aliases":["GHSA-h97m-27fx-42rx","RUSTSEC-2026-0158"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Matrix SDK UI library","requires_auth":"high_privilege","summary":"A malicious homeserver can spoof encrypted messages by bypassing edit validation, allowing impersonation of users in Matrix clients.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. The message edit validation logic in the  `matrix-sdk-ui` crate prior to 0.17.0 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrators (or actors with equivalent power) to impersonate or spoof messages as if they were sent by a victim user. `matrix-sdk-ui` 0.17.0 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification. No known workarounds are available.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"matrix-sdk-ui: Incomplete edit validation","id":"CVE-2026-45057","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"electerm: Import unsafe bookmark data could lead to unsafe operation when click local type bookmark","id":"CVE-2026-45058"},"packages":[{"ecosystem":"crates.io","fixed":["0.16.1"],"introduced":["0"],"last_affected":[],"package":"matrix-sdk-ui","purl":null,"source":"GHSA-h97m-27fx-42rx"},{"ecosystem":"crates.io","fixed":["0.16.1"],"introduced":["0"],"last_affected":[],"package":"matrix-sdk-ui","purl":"pkg:cargo/matrix-sdk-ui","source":"GHSA-h97m-27fx-42rx"},{"ecosystem":"crates.io","fixed":["0.16.1"],"introduced":["0.0.0-0"],"last_affected":[],"package":"matrix-sdk-ui","purl":"pkg:cargo/matrix-sdk-ui","source":"RUSTSEC-2026-0158"}],"prev":{"headline":"Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution","id":"CVE-2026-45056"},"products":["matrix-sdk-ui"],"published":"2026-09-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-14","vendors":["matrix-org"]},"summary":"A malicious homeserver can spoof encrypted messages by bypassing edit validation, allowing impersonation of users in Matrix clients.","url":"https://insights.sbomify.com/CVE-2026-45057/"}