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CVE-2024-42369

17
FAUCET Score

CVE-2024-42369 is a denial-of-service vulnerability affecting the matrix-js-sdk, a JavaScript client-server SDK for the Matrix messaging protocol. A malicious homeserver can craft a room structure with cyclical predecessors, causing the getRoomUpgradeHistory function to infinitely recurse and hang the client. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low-complexity attack that can be executed remotely without user interaction, leading to a loss of availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 34.3.1CPE matchmatch criteria
cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.3
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 23rd percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: matrix-js-sdkFixed in: 34.3.1

Vendor Advisories (1)

npmGHSA-vhr5-g3pm-49fmmedium

matrix-js-sdk will freeze when a user sets a room with itself as a its predecessor

Aug 20, 2024

References

github.com / matrix-org/matrix-js-sdk/commit/a0efed8b881b3db6c9f2c71d6a6e74c2828978c6
Patch
github.com / matrix-org/matrix-js-sdk/security/advisories/GHSA-vhr5-g3pm-49fm
Vendor Advisory