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CVE-2026-81319— Unsafe deserialization of decrypted terms enables node DoS in AshCloak

Quick assessment

Affected
ash-project ash_cloak
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 AshCloak是Ash Framework组织的一款数据加密与脱敏工具。 Ash Framework AshCloak 0.1.0至0.4.0之前版本存在反序列化注入漏洞，该漏洞源于对不受信任数据的反序列化处理不当，未使用安全选项，可能导致攻击者影响加密列字节，在解密时触发无界原子创建或解压炸弹，造成BEAM节点崩溃。

CVSS 5.9 · Medium EPSS 0.37% · P29

Affected Version Matrix 2

VendorProduct Version RangeStatus
ash-project ash_cloak 0.1.0< 0.4.0 affected
f1595a77fdfa9bfc672f84c2f77feb9e7bf895fc< 1690f0a436efe3e7c11d70d74ff5a8ac0fdf6608 affected
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I. Basic Information for CVE-2026-81319

Vulnerability Information
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Vulnerability Title
Unsafe deserialization of decrypted terms enables node DoS in AshCloak
Source: CVE Program / CVE List V5
Vulnerability Description
Deserialization of Untrusted Data vulnerability in ash-project ash_cloak allows an attacker who can influence the bytes of an encrypted column to crash the BEAM node, by triggering unbounded atom creation or a decompression bomb during decryption. AshCloak.Calculations.Decrypt decodes the decrypted binary with Ash.Helpers.non_executable_binary_to_term/1 without the :safe option, so atoms in the payload are interned during the decode and never garbage collected, and the term format's compressed form is inflated transparently. vault.decrypt!() is the only barrier and stops tampering only for an authenticated cipher. Cloak also ships the unauthenticated AES.CTR, whose ciphertext an attacker who knows their own plaintext can XOR into any same-length payload without the key, so an ordinary read of the forged column reaches the decoder. A few hundred kilobytes of distinct atoms exhausts the atom table, or a small compressed payload inflates to gigabytes. This issue affects ash_cloak: from 0.1.0 before 0.4.0.
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 AshCloak 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ash Framework AshCloak是Ash Framework组织的一款数据加密与脱敏工具。 Ash Framework AshCloak 0.1.0至0.4.0之前版本存在反序列化注入漏洞，该漏洞源于对不受信任数据的反序列化处理不当，未使用安全选项，可能导致攻击者影响加密列字节，在解密时触发无界原子创建或解压炸弹，造成BEAM节点崩溃。
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_cloak 0.1.0 ~ 0.4.0 cpe:2.3:a:ash-project:ash_cloak:*:*:*:*:*:*:*:*
ash-project ash_cloak f1595a77fdfa9bfc672f84c2f77feb9e7bf895fc ~ 1690f0a436efe3e7c11d70d74ff5a8ac0fdf6608 cpe:2.3:a:ash-project:ash_cloak:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-81319

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III. Intelligence Information for CVE-2026-81319

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Patches & Fixes for CVE-2026-81319 (1)

Vendor Advisories for CVE-2026-81319 (3)

Same Patch Batch · ash-project · 2026-08-30 · 20 CVEs total

CVE-2026-81636 8.7 HIGH Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables de
CVE-2026-78699 7.2 HIGH rename_tenant returns :ok on a failed rename, enabling cross-tenant access in AshPostgres
CVE-2026-80223 7.1 HIGH Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory with
CVE-2026-78693 6.9 MEDIUM Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal f
CVE-2026-81633 6.9 MEDIUM Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type
CVE-2026-77454 5.9 MEDIUM exists/2 predicate silently dropped on limited relationships with a parent() filter in Ash
CVE-2026-75847 5.9 MEDIUM Sensitive attribute values stored in a non-sensitive public changes map in AshPaperTrail
CVE-2026-78228 5.9 MEDIUM Unbounded handle_error recursion enables denial of service in AshOban triggers
CVE-2026-78038 5.9 MEDIUM Job argument injection via :args overrides primary_key and tenant in AshOban
CVE-2026-77970 5.9 MEDIUM Sensitive fields nested in embedded values are not redacted in AshPaperTrail versions
CVE-2026-82367 2.3 LOW Re-entrant synchronous publish in AshGraphql subscription batcher delivers one subscriber'
CVE-2026-81643 2.3 LOW Broken access control in AshGraphql subscription batcher applies authorization suppression
CVE-2026-80227 2.1 LOW SQL string_trim removes only spaces, diverging from in-memory trimming in AshSql
CVE-2026-78691 2.1 LOW Unescaped backslash allows LIKE wildcard injection in AshSql string search
CVE-2026-81316 2.1 LOW Same-named aggregates with differing filters are conflated in AshSql
CVE-2026-81318 2.1 LOW Distinct-query aggregate drops the tenant schema prefix, leaking across tenants in AshSql
CVE-2026-81322 2.1 LOW Cloaked plaintext leaks through a non-sensitive action argument in AshCloak
CVE-2026-77846 2.1 LOW JSON path injection via unescaped get_path segments in AshSqlite
CVE-2026-77831 2.1 LOW Algorithmic-complexity denial of service in AshPaperTrail full-diff list tracking

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-81319

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