Denial of service (via resource exhaustion) due to improper input validation in third-party identifier endpoint
Priority LOW 38CWE-400Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
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- Attack complexity
- —
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-400.
Summary
### Impact Missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. ### Patches The issue is fixed by https://github.com/matrix-org/synapse/pull/9855. ### Workarounds There are no known workarounds. ### References n/a ### For more information If you have any questions or comments about this advisory, email us at [email protected].
Why it matters now
Fix Fixed matrix-synapse (PyPI): 1.33.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | matrix-synapse (PyPI) | before 1.33.0 | 1.33.0 | Patch available | GHSA-7h5v-85w9-pq6c |
- matrix-synapse (PyPI) Vendor— Affected before 1.33.0 Fixed in 1.33.0 Patch available GHSA-7h5v-85w9-pq6c
Remediation
- Fix · GHSA-7h5v-85w9-pq6c matrix-synapse (PyPI) Fixed in 1.33.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-7h5v-85w9-pq6c
References
Sources
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