TI-2026-56148 Aliases CVE-2026-81319

Unsafe deserialization of decrypted terms enables node DoS in AshCloak

MEDIUM 60CWE-502Published 2026-08-30 · Updated 2026-09-01

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

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00367 30th percentileScored 2026-11-07

Fix Fixed ash_cloak (ash-project): 0.4.0

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

Vendor	Product	Affected versions	Fixed in	Status	Source
ash-project	ash_cloak	0.1.0 to before 0.4.0	0.4.0	Patch available	CNA

ash_cloak Vendorash-project Affected 0.1.0 to before 0.4.0 Fixed in 0.4.0 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ash-project:ash_cloak::::::::	—	—	—

cpe:2.3:a:ash-project:ash_cloak:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

Fix · CNA ash_cloak (ash-project) Fixed in 0.4.0

Fixed in the same release

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

Release · 2026-08-30
ash-project ash_cloak 0.4.0
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2026-56151 Cloaked plaintext leaks through a non-sensitive action argument in AshCloakPriority MEDIUM 44
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-81319

References

Patch 1

https://github.com/ash-project/ash_cloak/commit/1690f0a436efe3e7c11d70d74ff5a8ac0fdf6608

Advisory 1

https://github.com/ash-project/ash_cloak/security/advisories/GHSA-rc26-mrm2-6pf9

Other 2

TI-2026-56298 Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service CVSS 4.0HIGH 8.7
TI-2026-52572 Unbounded atom creation from client-supplied RPC field names in AshTypescript field formatter CVSS 4.0HIGH 8.7
TI-2026-57010 Path traversal in AshAdmin file uploads via unsanitized client filename CVSS 4.0HIGH 8.3
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-2026-54252 EEx template evaluation of prompt content in AshAi enables remote code execution CVSS 4.0HIGH 8.9
TI-2026-54208 Stored XSS in AshAdmin relationship typeahead via unescaped label_field content CVSS 4.0HIGH 8.4

See all 90 →

Sources

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