ash-project ash up to 3.31.0 Keyset Pagination lib/ash/page/keyset.ex decode_values resource consumption

Summaryinfo

A vulnerability was found in ash-project ash up to 3.31.0 and classified as problematic. This impacts the function decode_values of the file lib/ash/page/keyset.ex of the component Keyset Pagination. Executing a manipulation can lead to resource consumption. This vulnerability is handled as CVE-2026-69659. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in ash-project ash up to 3.31.0. It has been declared as problematic. This vulnerability affects the function decode_values of the file lib/ash/page/keyset.ex of the component Keyset Pagination. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

Uncontrolled Resource Consumption vulnerability in ash-project ash allows an attacker to exhaust the memory of the node via a crafted keyset pagination cursor. Read actions with keyset pagination deserialize the client-supplied page[:after] or page[:before] cursor in decode_values/2 in lib/ash/page/keyset.ex, which base64-decodes the value and passes it to :erlang.binary_to_term/2 without bounding its size. The Erlang external term format supports zlib-compressed payloads, which the decoder inflates transparently, so a cursor of a few kilobytes can allocate tens of megabytes of heap in a single call. Ash itself only ever encodes cursors uncompressed, so the decoder accepts a term shape its encoder never produces. Concurrent requests aggregate these allocations and can terminate the node. This issue affects ash: from 1.17.0 before 3.31.1.

The advisory is available at github.com. This vulnerability was named CVE-2026-69659 since 08/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. 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 3.31.1 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• ash-project

Name

• ash

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31.0

Website

• Product: https://github.com/ash-project/ash/

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