CVE-2026-109584 mtrudel bandit - Denial of Service

mtrudel bandit 0.3.3 before 1.14.0 contains a denial of service caused by improper handling of highly compressed HPACK HEADERS blocks in HTTP/2, letting unauthenticated remote attackers exhaust server memory via data amplification, exploit requires sending crafted HPACK-compressed headers.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
26 October 2026
Updated
27 October 2026
Weakness
CWE-409

Vendor fix

Update to version 1.14.0 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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