CVE-2026-69184 c-ares - Denial of Service

c-ares < 1.34.7 contains a denial of service caused by unbounded DNS compression pointer hops in ares_dns_name_parse(), letting malicious DNS servers stall the event loop, exploit requires crafted DNS response.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.68% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-407

Vendor fix

Update to version 1.34.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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