CVE-2026-54427

highpriority · track · 0EPSS 0.002 · 6 %ile

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.16% (6th) EPSS

CVSS 7.5 · high

Is it mine?

0 products

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Who says so?

— sources

EPSS · scored 2026-10-27

Uncontrolled recursion in the AMF parser in Apache bRPC < 1.18.0 allows a remote RTMP peer to crash a bRPC process by sending deeply nested AMF objects or arrays. The parser recursively processed nested AMF containers without enforcing a depth limit, which could exhaust the native stack. Affected Scenarios: Applications using bRPC RTMP support and parsing AMF data from an untrusted RTMP peer. This includes RTMP servers parsing client command messages, RTMP clients parsing server responses or status messages, and either side parsing inbound AMF script data such as metadata or cue points. Direct callers of ReadAMFObject or ReadAMFArray on untrusted input are also affected. How to Fix: 1. Upgrade Apache bRPC to 1.18.0. 2. Apply the patch from PR https://github.com/apache/brpc/pull/3344 . Note: The fix introduces a configurable AMF nesting depth limit with default value 128. AMF objects or arrays deeper than amf_max_depth are rejected after applying the fix.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · grimoire (LLM-derived)LLM-inferred

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-674USprimaryCWE-674US

affected products

Products and version ranges known to be affected.

No affected products recorded.

sources

Which sources assert this record, and when.

NVD CVE.org MITRE

published 2026-10-21modified 2026-10-26

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+720 more

references (1) nvd

External citations — patches, advisories, analysis.

https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb

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