Unauthenticated request injection via malformed Transfer-Encoding parsing
Published Aug 12, 2026 · Updated Aug 12, 2026
HTTP request smuggling in Apple ServiceTalk before 0.42.65 allows remote attackers to inject arbitrary HTTP requests via malformed headers. HttpObjectDecoder.readHeaders accepts Transfer-Encoding on non-HTTP/1.1 messages, treats chunked as final when it is not, and keeps connections open after Transfer-Encoding and Content-Length conflicts. Unauthenticated network access to an HTTP/1.x endpoint using the affected decoder is sufficient; parser disagreement can splice attacker-controlled requests into the connection.
Summary
What happened
HTTP request smuggling in Apple ServiceTalk before 0.42.65 allows remote attackers to inject arbitrary HTTP requests via malformed headers. HttpObjectDecoder.readHeaders accepts Transfer-Encoding on non-HTTP/1.1 messages, treats chunked as final when it is not, and keeps connections open after Transfer-Encoding and Content-Length conflicts. Unauthenticated network access to an HTTP/1.x endpoint using the affected decoder is sufficient; parser disagreement can splice attacker-controlled requests into the connection.
The record
- CVE
- CVE-2026-65370
- Published
- Aug 12, 2026
- Updated
- Aug 12, 2026
- Vendor
- Apple
- Product
- ServiceTalk
- Classifications
- CWE-444, CAPEC-33, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 12, 2026CVE publishedPublication date reported by the CVE source.
- Aug 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <0.42.65
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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