deepstream is vulnerable to prototype pollution
Priority MEDIUM 43CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
deepstream is a server that allows clients and backend services to sync data, send messages and make rpcs at scale. Versions prior to 10.0.5 are vulnerable to Prototype Pollution. Exploitation can lead to potential privilege escalation from any authenticated user with write permission to any record. This issue has been fixed in version 10.0.5.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0047 40th percentileScored 2026-11-07
Fix Fixed deepstream.io (deepstreamIO): 10.0.5@deepstream/server (npm): 10.0.5
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 |
|---|---|---|---|---|---|
| deepstreamIO | deepstream.io | before 10.0.5 | 10.0.5 | Patch available | CNA |
| — | @deepstream/server (npm) | before 10.0.5 | 10.0.5 | Patch available | GHSA-9v98-6g37-x9g6 |
- deepstream.io VendordeepstreamIO Affected before 10.0.5 Fixed in 10.0.5 Patch available CNA
- @deepstream/server (npm) Vendor— Affected before 10.0.5 Fixed in 10.0.5 Patch available GHSA-9v98-6g37-x9g6
Remediation
- Fix · CNA deepstream.io (deepstreamIO) Fixed in 10.0.5
- Fix · GHSA-9v98-6g37-x9g6 @deepstream/server (npm) Fixed in 10.0.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-49252
- 2026-10-03 Alias added: GHSA-9v98-6g37-x9g6
References
More deepstreamIO vulnerabilities
- TI-2026-45058 deepstream: PATCH_MULTI action bypasses Valve permission system allowing unauthorized record writes CVSS 3.1HIGH 8.8
Sources
- CVE-2026-49252 · CVE Program
- CVE-2026-49252 · NVD
- FIRST EPSS
- GHSA-9v98-6g37-x9g6 · GitHub Advisory Database · CC BY 4.0
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