elixir-mint up to 1.10.x HTTP/2 Frame Decoder lib/mint/http2/frame.ex Mint.HTTP/2.Frame.decode_next allocation of resources

Summaryinfo

A vulnerability, which was classified as problematic, was found in elixir-mint mint up to 1.10.x. Impacted is the function Mint.HTTP2.Frame.decode_next of the file lib/mint/http2/frame.ex of the component HTTP2 Frame Decoder. The manipulation results in allocation of resources. This vulnerability is reported as CVE-2026-92103. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in elixir-mint mint up to 1.10.x. Affected is the function Mint.HTTP2.Frame.decode_next of the file lib/mint/http2/frame.ex of the component HTTP2 Frame Decoder. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint mint allows a malicious HTTP/2 server to make the client hold up to about 16 MiB per connection in frames it should reject, consuming client memory. Mint.HTTP2.Frame.decode_next/2 in lib/mint/http2/frame.ex compares a frame with the client's max_frame_size (16,384 bytes by default) only once the whole declared payload has arrived. Until then it returns :more, and Mint.HTTP2 keeps every received byte in the connection buffer. A server can declare a frame length of up to 16,777,215 bytes and withhold the last byte, keeping roughly 1,024 times the advertised limit buffered for as long as the connection stays open. The server has to send every byte the client buffers, so there is no amplification, and the buffer stops at the 24-bit frame length limit. This issue affects mint: from 0.1.0 before 1.11.0.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-92103 since 09/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.11.0 eliminates this vulnerability.

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Productinfo

Vendor

• elixir-mint

Name

• mint

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10

Website

• Product: https://github.com/elixir-mint/mint/

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