matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal
Priority LOW 26CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbitrary authenticated GET requests to the client's homeserver. Fixed in matrix-js-sdk 34.11.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00829 57th percentileScored 2026-11-07
Fix Fixed matrix-js-sdk (matrix-org): 34.11.1matrix-js-sdk (npm): 34.11.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| matrix-org | matrix-js-sdk | before 34.11.1 | 34.11.1 | Patch available | CNA |
| — | matrix-js-sdk (npm) | before 34.11.1 | 34.11.1 | Patch available | GHSA-xvg8-m4x3-w6xr |
- matrix-js-sdk Vendormatrix-org Affected before 34.11.1 Fixed in 34.11.1 Patch available CNA
- matrix-js-sdk (npm) Vendor— Affected before 34.11.1 Fixed in 34.11.1 Patch available GHSA-xvg8-m4x3-w6xr
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:*:*:* | — | — | matrix-org |
- cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:*:*:* Versions — — ·matrix-org
Remediation
- Fix · CNA matrix-js-sdk (matrix-org) Fixed in 34.11.1
- Fix · GHSA-xvg8-m4x3-w6xr matrix-js-sdk (npm) Fixed in 34.11.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-50336
- 2026-10-03 Alias added: GHSA-xvg8-m4x3-w6xr
References
More matrix-org vulnerabilities
- TI-2023-20035 Sydent does not verify email server certificates CVSS 3.1CRITICAL 9.3
- TI-2026-45046 Dendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint CVSS 4.0MEDIUM 6.9
- TI-2026-45045 Dendrite 0.13.8 Improper Authorization via POST account/3pid/delete Endpoint CVSS 4.0HIGH 7.1
- TI-2026-45047 Dendrite 0.13.8 syncapi /context Endpoint Post-Leave State Exposure CVSS 4.0MEDIUM 5.3
- TI-2023-15617 Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites CVSS 3.1MEDIUM 5.0
- TI-2023-20039 matrix-appservice-irc IRC command injection via admin commands containing newlines CVSS 3.1CRITICAL 9.8
Sources
- CVE-2024-50336 · CVE Program
- CVE-2024-50336 · NVD
- FIRST EPSS
- GHSA-xvg8-m4x3-w6xr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences