CVE-2026-61629 nginx-ignition - Denial of Service

nginx-ignition 2.29.0 through 2.40.0 contains a denial of service caused by unfiltered Accept-Language header parsing in gin i18n middleware, letting unauthenticated attackers cause high CPU usage, exploit requires crafted Accept-Language header.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.42% 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
21 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Upgrade to version 2.40.1 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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