CVE-2026-56811
unknown
CVSS v3
—
CVSS v4 NEW
8.7
VIR risk
—
Description
Phoenix transports do not limit channel joins per connection, enabling process-exhaustion denial of service
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Hex | phoenix | >=0.11.0,<1.5.15||>=1.6.0-rc.0,<1.6.17||>=1.7.0-rc.0,<1.7.24||>=1.8.0-rc.0,<1.8.9 | 1.5.15 |
References
- https://cna.erlef.org/cves/CVE-2026-56811.html
- https://github.com/phoenixframework/phoenix/commit/16e295d2fccab185d1292322e2bee5d46c725c8a
- https://github.com/phoenixframework/phoenix/commit/a612100cd8a4279091abc1a2ef8fb98a6d01c0a1
- https://github.com/phoenixframework/phoenix/commit/c498ba8cf49f6accbbd0c643a5340b58db891218
- https://github.com/phoenixframework/phoenix/commit/d19ca0a8d9f82c130b7ed339b9f033433e2dea5e
- https://github.com/phoenixframework/phoenix/security/advisories/GHSA-6983-jfq8-485w
- https://osv.dev/vulnerability/EEF-CVE-2026-56811
- https://hex.pm/packages/phoenix
CWEs
CWE-770
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.