Improper beacon events in matrix-js-sdk can result in availability issues
Impact
Improperly formed beacon events (from MSC3488) can disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer's ability to process data safely. Note that the matrix-js-sdk can appear to be operating normally but be excluding or corrupting runtime data presented to the consumer.
Patches
This is patched in matrix-js-sdk v19.7.0
Workarounds
Redacting applicable events, waiting for the sync processor to store data, and restarting the client can often fix it. Alternatively, redacting the applicable events and clearing all storage will fix the further perceived issues.
Downgrading to an unaffected version, noting that such a version may be subject to other vulnerabilities, will additionally resolve the issue.
References
N/A - This was a logic error in the SDK.
For more information
If you have any questions or comments about this advisory please email us at security at matrix.org.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | matrix-js-sdk | >= 17.1.0-rc.1, < 19.7.0 | 19.7.0 |
References
- https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-hvv8-5v86-r45x
- https://nvd.nist.gov/vuln/detail/CVE-2022-39236
- https://github.com/matrix-org/matrix-spec-proposals/pull/3488
- https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76
- https://github.com/matrix-org/matrix-js-sdk
- https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0
- https://security.gentoo.org/glsa/202210-35
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-20- Platform
- npm
- Package
matrix-js-sdk- Disclosed
- 29.09.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hvv8-5v86-r45x - CC BY 4.0
Vulnerability history: matrix-js-sdk
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 12
- First → latest
- 09.2021 09.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 6
- Medium 6
Disclosures per year
- 2021: 1
- 2022: 4
- 2023: 3
- 2024: 3
- 2025: 1
- 2026: 0
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Improper beacon events in matrix-js-sdk can result in availability issues this entry
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