CVE-2026-93564 HAProxy - Resource Leak

HAProxy contains a PROXY-v2 nested-TLV grandchild ByteBuf reference-count leak caused by incomplete fix of PR #16881, letting attackers cause resource leaks, exploit requires crafted PROXY-v2 nested-TLV packets.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.89% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Resource Leak
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-1035

Vendor fix

Update to the latest version with the complete fix for PR #16881.

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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