CVE-2022-39252

Name: CVE-2022-39252
Creator: NVD / NIST
Published: 2022-09-29T15:15:10.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2022-39252 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. matrix-rust-sdk is an implementation of a Matrix client-server library in Rust, and matrix-sdk-crypto is the Matrix encryption library. Prior to version 0.6, when a user requests a room key from their devices, the software correctly remembers the request. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

matrix-rust-sdk is an implementation of a Matrix client-server library in Rust, and matrix-sdk-crypto is the Matrix encryption library. Prior to version 0.6, when a user requests a room key from their devices, the software correctly remembers the request. When the user receives a forwarded room key, the software accepts it without checking who the room key came from. This allows homeservers to try to insert room keys of questionable validity, potentially mounting an impersonation attack. Version 0.6 fixes this issue.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.48%

38.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Matrix	Matrix-Rust-Sdk	< 0.6

References

https://github.com/matrix-org/matrix-rust-sdk/commit/093fb5d0aa21c0b5eaea6ec96b477f1075271cbbPatch, Third Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/commit/41449d2cc360e347f5d4e1c154ec1e3185f11acdPatch, Third Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.6.0Release Notes, Third Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-vp68-2wrm-69qmThird Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/commit/093fb5d0aa21c0b5eaea6ec96b477f1075271cbbPatch, Third Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/commit/41449d2cc360e347f5d4e1c154ec1e3185f11acdPatch, Third Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.6.0Release Notes, Third Party Advisory
https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-vp68-2wrm-69qmThird Party Advisory

Timeline

Published: Sep 29, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-39252?

How severe is CVE-2022-39252?

CVE-2022-39252 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2022-39252?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-39252?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST