CVE-2026-45057Medium· 4.9▾ Sunlitmatrix-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 i…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
0.2% → 0.2%
Last analysed / modified upstream
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
matrix-sdk-ui >= 0.0.0-0, < 0.16.1Patched in:
matrix-sdk-ui 0.16.1Connected by shared product, vendor, weakness, or advisory.
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