CVE-2026-56386 Apache bRPC - Denial of Service

Apache bRPC < 1.18.0 contains an integer underflow and out-of-bounds read caused by improper handling of zero-length padded HTTP/2 DATA frames, letting unauthenticated remote attackers cause denial of service by sending malformed frames.

CVSS base score 7.5 /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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-125

Vendor fix

Upgrade Apache bRPC to version 1.18.0 or apply the patch at https://github.com/apache/brpc/pull/3325.

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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