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7.5
cleanstart external-dns-fips and nginx-prometheus-exporter-fips can be halted by crafted messages
published 5 days ago
Summary
If a connection is opened, a malicious counterpart can send specially crafted data that stops the communication completely. This can make the affected services unavailable until the connection is reset. Install the latest updates from the vendors or apply the provided patches to prevent the problem.
What to do
- Update cleanstart external-dns-fips to version 0.22.0-r2.
- Update cleanstart nginx-prometheus-exporter-fips to version 1.5.3-r2.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| CleanStart | cleanstart | external-dns-fips |
< 0.22.0-r2 Fix: upgrade to 0.22.0-r2
|
| CleanStart | cleanstart | nginx-prometheus-exporter-fips |
< 1.5.3-r2 Fix: upgrade to 1.5.3-r2
|
Original advisory text
Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection
CVE-2026-56855 affects multiple packages. Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. See references for individual vulnerability details.
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Timeline
Published31 Oct 2026
Updated31 Oct 2026
First seen31 Oct 2026
Sources
CLEANSTART-2026-SZ85872 · OSV
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