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.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-81319.html
- https://github.com/ash-project/ash_cloak/commit/1690f0a436efe3e7c11d70d74ff5a8ac
- https://github.com/ash-project/ash_cloak/security/advisories/GHSA-rc26-mrm2-6pf9
- https://osv.dev/vulnerability/EEF-CVE-2026-81319
- https://github.com/ash-project/ash_cloak/security/advisories/GHSA-rc26-mrm2-6pf9
FAQ
What is CVE-2026-81319?
CVE-2026-81319 is a documented vulnerability. 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 crea...
How severe is CVE-2026-81319?
CVSS scoring is not yet available for CVE-2026-81319. Check NVD for updates.
Is there a patch for CVE-2026-81319?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.