CVE-2026-69659
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.
- Score
- CVSS 4.0 5.9 Medium
- Status
- Analyzed - 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- Published
- 2026-08-09
- Last modified
- 2026-10-24
- Weaknesses
- CWE-502
Affected products
References
- https://github.com/ash-project/ash/security/advisories/GHSA-j35q-v8h8-7mwq
- https://cna.erlef.org/cves/CVE-2026-69659.html
- https://osv.dev/vulnerability/EEF-CVE-2026-69659
- https://github.com/ash-project/ash/commit/1816b103af975221210478d61db20adcea700319
