Bug 2535489 (CVE-2026-77404)

Summary: CVE-2026-77404 github.com/rabbitmq/amqp091-go: RabbitMQ amqp091-go: Connection configuration overwrite via unsanitized TLS path parameter injection
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, cmah, dhanak, doconnor, drosa, dsimansk, eaguilar, ebaron, eglynn, gparvin, jbalunas, jjoyce, jmatsuok, jpretori, jschluet, jtolenti, kingland, lhh, mburns, mgarciac, mnovotny, pjindal, rhaigner, sausingh, tsze
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in RabbitMQ amqp091-go. The URI.String function in uri.go concatenates TLS asset path values directly into an AMQPS query string without proper encoding. If an application processes a TLS asset path containing special characters like ampersand or equals delimiters, these can be misinterpreted during URI re-parsing. This vulnerability could allow an attacker to overwrite connection options, potentially corrupting the connection configuration or selecting unintended local cryptographic assets, leading to a compromise of the TLS connection.
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Description OSIDB Bzimport 2026-09-16 14:52:23 UTC 
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, URI.String in uri.go concatenates CertFile, KeyFile, CACertFile, and ServerName values directly into an AMQPS query string instead of encoding them as URL query parameters with url.Values. If an application accepts a TLS asset path containing ampersand or equals delimiters and later reparses the serialized URI with ParseURI, the embedded delimiters can create or overwrite connection options, including paths to TLS certificate, key, or CA files. This can corrupt connection configuration or select unintended local cryptographic assets. This issue is fixed in version 1.13.0.