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TI-2026-48952 Aliases CVE-2026-69659

Memory exhaustion via unbounded deserialization of keyset pagination cursors in Ash.Page.Keyset

Priority MEDIUM 60CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Fix Fixed ash (ash-project): 3.31.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ash-projectash1.17.0 to before 3.31.13.31.1Patch availableCNA
  • ash Vendorash-project Affected 1.17.0 to before 3.31.1 Fixed in 3.31.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ash-hq:ash_framework:*:*:*:*:*:*:*:*1.17.0 to before 3.31.1Vulnerableash-project
  • cpe:2.3:a:ash-hq:ash_framework:*:*:*:*:*:*:*:* Versions 1.17.0 to before 3.31.1 Vulnerable ·ash-project

Remediation

  • Fix · CNA ash (ash-project) Fixed in 3.31.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    ash-project ash 3.31.1

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-49183 Predicate injection in manage_relationship belongs_to lookup discloses secret lookup keys in AshPriority LOW 11
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-69659

References

Patch 3

Advisory 1

  • TI-2026-26840 Ash Framework: Ash.Type.Module.cast_input/2 atom exhaustion via unchecked Module.concat allows BEAM VM crash CVSS 4.0HIGH 8.2
  • TI-2026-47745 Filter expression injection via forged keyset pagination cursor in Ash CVSS 4.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences