CVE-2026-45056

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Source
https://cve.org/CVERecord?id=CVE-2026-45056
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45056.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-45056
Aliases
Published
2026-09-11T21:13:56Z
Modified
2026-10-21T02:58:03Z
Severity
  • 6.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution
Details

matrix-sdk-crypto is a no-network-IO implementation of a state machine that handles end-to-end encryption for Matrix clients. Starting in version 0.12.0 and prior to version 0.17.0, the matrix-sdk-crypto crate was missing a check for the user ID when decrypting an Olm-encrypted event containing the sender_device_keys property. This could be exploited to forge an encrypted to-device event, but only if the attacker colludes with the homeserver operator. This issue is fixed in matrix-sdk-crypto 0.17.0. There are no known workarounds for the issue.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-290"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45056.json"
}
References

Affected packages

Git / github.com/matrix-org/matrix-rust-sdk

Affected ranges

Type
GIT
Repo
https://github.com/matrix-org/matrix-rust-sdk
Events
Introduced
b41efb063e1faa6579a22dd822777d9e2ce5af81
Fixed
ed148665d211ae97d4672437561ddeccf8556f0d
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0.12.0"
                },
                {
                    "fixed":  "0.16.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "original_tag":  "matrix-sdk-0.16.1",
            "range":  [
                {
                    "fixed":  "ed148665d211ae97d4672437561ddeccf8556f0d"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

matrix-sdk-0.*
matrix-sdk-0.12.0
matrix-sdk-0.13.0
matrix-sdk-0.16.0
matrix-sdk-base-0.*
matrix-sdk-base-0.12.0
matrix-sdk-base-0.13.0
matrix-sdk-base-0.16.0
matrix-sdk-common-0.*
matrix-sdk-common-0.12.0
matrix-sdk-common-0.13.0
matrix-sdk-common-0.16.0
matrix-sdk-crypto-0.*
matrix-sdk-crypto-0.12.0
matrix-sdk-crypto-0.13.0
matrix-sdk-crypto-0.16.0
matrix-sdk-ffi-0.*
matrix-sdk-ffi-0.12.0
matrix-sdk-ffi-0.13.0
matrix-sdk-ffi-0.16.0
Other
matrix-sdk-ffi/20250618
matrix-sdk-ffi/20250701
matrix-sdk-ffi/20250702
matrix-sdk-ffi/20250715
matrix-sdk-ffi/20250728
matrix-sdk-ffi/20250826
matrix-sdk-ffi/20250909
matrix-sdk-ffi/20251007
matrix-sdk-ffi/20251104
matrix-sdk-ffi/20251118
matrix-sdk-ffi/20251202
sdk-ffi/20250923
matrix-sdk-indexeddb-0.*
matrix-sdk-indexeddb-0.12.0
matrix-sdk-indexeddb-0.13.0
matrix-sdk-indexeddb-0.16.0
matrix-sdk-qrcode-0.*
matrix-sdk-qrcode-0.12.0
matrix-sdk-qrcode-0.13.0
matrix-sdk-qrcode-0.16.0
matrix-sdk-search-0.*
matrix-sdk-search-0.16.0
matrix-sdk-sqlite-0.*
matrix-sdk-sqlite-0.12.0
matrix-sdk-sqlite-0.13.0
matrix-sdk-sqlite-0.16.0
matrix-sdk-store-encryption-0.*
matrix-sdk-store-encryption-0.12.0
matrix-sdk-store-encryption-0.13.0
matrix-sdk-store-encryption-0.16.0
matrix-sdk-test-0.*
matrix-sdk-test-0.12.0
matrix-sdk-test-0.13.0
matrix-sdk-test-0.16.0
matrix-sdk-test-macros-0.*
matrix-sdk-test-macros-0.12.0
matrix-sdk-test-macros-0.13.0
matrix-sdk-test-macros-0.16.0
matrix-sdk-test-utils-0.*
matrix-sdk-test-utils-0.16.0
matrix-sdk-ui-0.*
matrix-sdk-ui-0.12.0
matrix-sdk-ui-0.13.0
matrix-sdk-ui-0.16.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45056.json"