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CVE-2026-54426high7.5

Apache bRPC: Stack Exhaustion via Unbounded Recursion in Redis Reply Parser

Impact

Uncontrolled recursion in the Redis reply parser in Apache bRPC < 1.18.0 allows a remote Redis server peer to crash a bRPC Redis client process by returning a deeply nested RESP array reply. The parser recursed once for each nested array level without enforcing a depth limit. The fix adds a configurable Redis reply depth limit with default value 128 and rejects replies exceeding that limit. 

Source excerpt · apache

What to do

Upgrade Apache bRPC to 1.18.0.

apache guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Apache Software Foundation · apache

Apache bRPC

1 range
apache version evidence

Package identity

pkg:github/apache/brpc

Identity supplied by apache. Version matching requires compatible range evidence.

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affected

0 → before 1.18.0

semver versions

unaffected

unknown

Other versions: unaffected

Original source description

Uncontrolled recursion in the Redis reply parser in Apache bRPC < 1.18.0 allows a remote Redis server peer to crash a bRPC Redis client process by returning a deeply nested RESP array reply. The parser recursed once for each nested array level without enforcing a depth limit. The fix adds a configurable Redis reply depth limit with default value 128 and rejects replies exceeding that limit. 

Affected Scenarios: Applications using bRPC as a Redis client with ChannelOptions.protocol="redis" and receiving replies from an untrusted or faulty Redis server peer.

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: After applying the fix, Redis replies with array nesting deeper than redis_max_reply_depth are rejected.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-54426

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Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-674 ↗

CWE-674 Uncontrolled Recursion

apache

Related →
Contributing organizations · 2
apache

Assigning organization

2026-10-21
CISA-ADP

Additional data publisher

2026-10-30

What changed

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References

1 sources
lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb
vendor-advisoryapache