CVE-2026-61902
Deferred Deferred - Pending Action

Memory Exhaustion via Oversized HTTP Body in Apache bRPC

Publication date: 2026-10-21

Last updated on: 2026-10-30

Assigner: Apache Software Foundation

Description
Apache bRPC versions before 1.18.0 do not consistently enforce the configured max_body_size limit in non-progressive HTTP/1 and HTTP/2 parsing and in memcache and couchbase response parsing. A remote unauthenticated peer can cause an affected process to buffer message data beyond the configured limit, which may lead to memory exhaustion and denial of service. Users should upgrade to 1.18.0 or apply the patch from PR https://github.com/apache/brpc/pull/3382 . The fix rejects oversized buffered HTTP bodies, returns HTTP 413 for HTTP/1 requests, resets oversized HTTP/2 streams, and rejects oversized memcache and couchbase responses from their declared lengths. Progressive HTTP reading remains supported because it uses bounded buffering.

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Meta Information

Published
2026-10-21
Last Modified
2026-10-30
Generated
2026-11-10
AI Q&A
2026-10-22
EPSS Evaluated
2026-11-09
NVD
CVE-2026-61902
EUVD
EUVD-2026-107176

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Apache Software Foundation Apache bRPC 0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.

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Executive Summary

Apache bRPC versions before 1.18.0 fail to consistently enforce the max_body_size limit during HTTP/1, HTTP/2, memcache, and couchbase response parsing. This allows remote unauthenticated attackers to send oversized messages, causing the server to buffer excessive data and potentially exhaust memory, leading to a denial of service.

Detection Guidance

To detect this vulnerability, monitor for excessive memory usage or crashes in Apache bRPC processes. Check HTTP responses exceeding configured max_body_size limits or HTTP 413 errors in logs. Inspect network traffic for unusually large payloads in HTTP/1, HTTP/2, memcache, or couchbase protocols.

Impact Analysis

This vulnerability can cause your Apache bRPC server to crash or become unresponsive due to memory exhaustion, disrupting services that rely on it. It may also allow attackers to perform denial of service attacks against your infrastructure.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it pertains to memory exhaustion and denial of service rather than data protection or privacy. However, a denial of service could indirectly impact systems handling regulated data by disrupting availability.

Mitigation Strategies

Upgrade Apache bRPC to version 1.18.0 or apply the patch from PR https://github.com/apache/brpc/pull/3382. The fix enforces max_body_size limits and rejects oversized requests or responses.

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