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CVE-2026-69659— Memory exhaustion via unbounded deserialization of keyset pagination cursors in Ash.Page.Keyset

Quick assessment

Affected
ash-project ash
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ash Framework是Ash Framework组织的一款基于Elixir的开发框架。 Ash Framework 1.17.0版本至3.31.1之前版本存在反序列化注入漏洞，该漏洞源于lib/ash/page/keyset.ex文件中的decode_values/2函数对客户端提供的page[:after]或page[:before]光标反序列化时未限制大小，且支持zlib压缩，导致内存消耗不受控制，攻击者可通过特制的keyset分页光标耗尽节点内存，造成拒绝服务。

CVSS 5.9 · Medium EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
ash-project ash 1.17.0< 3.31.1 affected
f8fadc67e67c955bb68b3a8d642be13e2b7e8ca9< 1816b103af975221210478d61db20adcea700319 affected
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I. Basic Information for CVE-2026-69659

Vulnerability Information
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Vulnerability Title
Memory exhaustion via unbounded deserialization of keyset pagination cursors in Ash.Page.Keyset
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Ash Framework 反序列化漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ash Framework是Ash Framework组织的一款基于Elixir的开发框架。 Ash Framework 1.17.0版本至3.31.1之前版本存在反序列化注入漏洞，该漏洞源于lib/ash/page/keyset.ex文件中的decode_values/2函数对客户端提供的page[:after]或page[:before]光标反序列化时未限制大小，且支持zlib压缩，导致内存消耗不受控制，攻击者可通过特制的keyset分页光标耗尽节点内存，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash 1.17.0 ~ 3.31.1 cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*
ash-project ash f8fadc67e67c955bb68b3a8d642be13e2b7e8ca9 ~ 1816b103af975221210478d61db20adcea700319 cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-69659

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III. Intelligence Information for CVE-2026-69659

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Patches & Fixes for CVE-2026-69659 (1)

Vendor Advisories for CVE-2026-69659 (3)

IV. Related Vulnerabilities

Same product: ash
Same vendor: ash-project
Same weakness: CWE-502

V. Comments for CVE-2026-69659

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