Apache bRPC: Stack Exhaustion via Unbounded Recursion in Redis Reply Parser
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EPSS probability
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Risk score
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Published
5 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Evidence confidence
%55
Short explanation
A stack exhaustion vulnerability exists in Apache bRPC versions due to uncontrolled recursion in the Redis reply parser [S0]. This allows a remote Redis server peer to crash a bRPC Redis client process by returning a deeply nested RESP array reply [S0].
Applications communicating with an untrusted or faulty Redis server peer are at risk of this vulnerability, which can cause client processes to crash [S0].
What should be done?
- Upgrade Apache bRPC to 1.18.0 [S0]
- Apply the specified pull request patch [S0]
- Follow vendor advisories regarding patch status [S0]
Chain of evidence and sources
Apache bRPC < 1.18.0 sürümlerindeki Redis yanıt ayrıştırıcısında kontrolsüz yineleme bulunmaktadır.
Uzak bir Redis sunucusu eşi, derinlemesine iç içe geçmiş RESP dizi yanıtı döndürerek bRPC Redis istemci sürecini çökertebilir.
Düzeltme, varsayılan değeri 128 olan yapılandırılabilir bir Redis yanıt derinliği sınırı eklemektedir.
Show the technical text from the sources
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.
CWE: CWE-674
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-54426 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Apache Software Foundation | Apache bRPC | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-54426 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-54426 weaknesses.
Official Sources and Advisories
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Weakness Type (CWE & CAPEC)
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