CVE-2026-69659

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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.

• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-69659.html
• github.comhttps://github.com/ash-project/ash/commit/1816b103af975221210478d61db20adcea700319
• github.comhttps://github.com/ash-project/ash/security/advisories/GHSA-j35q-v8h8-7mwq
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-69659