Apple servicetalk up to 0.42.64 Transfer-Encoding request smuggling

Summaryinfo

A vulnerability classified as problematic was found in Apple servicetalk up to 0.42.64. This affects an unknown part of the component Transfer-Encoding. Such manipulation leads to request smuggling. This vulnerability is referenced as CVE-2026-65370. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Apple servicetalk up to 0.42.64. Affected by this issue is an unknown function of the component Transfer-Encoding. The manipulation with an unknown input leads to a request smuggling vulnerability. Using CWE to declare the problem leads to CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. Impacted is integrity. CVE summarizes:

ServiceTalk HTTP/1.x incorrectly handles malformed Transfer-Encoding which could result in request smuggling attacks. This vulnerability is addressed in servicetalk version 0.42.65.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-65370 since 07/22/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/12/2026).

Upgrading to version 0.42.65 eliminates this vulnerability.

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Productinfo

Vendor

• Apple

Name

• servicetalk

Version

• 0.42.0
• 0.42.1
• 0.42.2
• 0.42.3
• 0.42.4
• 0.42.5
• 0.42.6
• 0.42.7
• 0.42.8
• 0.42.9
• 0.42.10
• 0.42.11
• 0.42.12
• 0.42.13
• 0.42.14
• 0.42.15
• 0.42.16
• 0.42.17
• 0.42.18
• 0.42.19
• 0.42.20
• 0.42.21
• 0.42.22
• 0.42.23
• 0.42.24
• 0.42.25
• 0.42.26
• 0.42.27
• 0.42.28
• 0.42.29
• 0.42.30
• 0.42.31
• 0.42.32
• 0.42.33
• 0.42.34
• 0.42.35
• 0.42.36
• 0.42.37
• 0.42.38
• 0.42.39
• 0.42.40
• 0.42.41
• 0.42.42
• 0.42.43
• 0.42.44
• 0.42.45
• 0.42.46
• 0.42.47
• 0.42.48
• 0.42.49
• 0.42.50
• 0.42.51
• 0.42.52
• 0.42.53
• 0.42.54
• 0.42.55
• 0.42.56
• 0.42.57
• 0.42.58
• 0.42.59
• 0.42.60
• 0.42.61
• 0.42.62
• 0.42.63
• 0.42.64

License

• commercial

Website

• Vendor: https://www.apple.com/
• Product: https://github.com/apple/servicetalk/

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