CVE-2026-69659

Description

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.

Weakness classification

• 6b3ad84c-e1a6-4bf7-a703-f496b71e49db: CWE-502

Primary references

• 6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Third Party Advisory
• 6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Patch
• 6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Vendor Advisory, Patch
• 6b3ad84c-e1a6-4bf7-a703-f496b71e49db — Third Party Advisory, Patch
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Vendor Advisory, Patch