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.

CVSS 4.0

5.9CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-25)

CWE

CWE-502

Published

2026-08-09

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• ash-hq:ash_framework

References

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

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