AIKIDO-2026-753086
ash_authentication is vulnerable to Use of a One-Way Hash with a Predictable Salt
19
Low Risk
This Affects:
ash_authenticationTL;DR
In ash_authentication, reversible IP address pseudonymisation in AshAuthentication audit log hash mode. AshAuthentication.AddOn.AuditLog.IpPrivacy.hash_ip/1 computes a single unkeyed :crypto.hash(:sha256, salt > ip) and truncates the result to 16 hexadecimal characters. The IPv4 space is only 2^32 values and SHA-256 is fast, so the whole hash table is precomputable and every stored value maps back to its source address.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
ash_authentication is vulnerable to Use of a One-Way Hash with a Predictable Salt in versions 4.12.0 - 4.14.2.
How to fix this
Upgrade the ash_authentication library to the patch version.
Links
Fix Commits
github.com/team-alembic/ash_authentication/commit/255cfc9c0e511b7e0de39f8b3d676ae994fae06cgithub.com/team-alembic/ash_authentication/commit/c3a6d5fe0d4fd383ea81b0402db0a96638479478github.com/team-alembic/ash_authentication/commit/d8a9c4b6bde828fdc8346198d5e4f588b5937541
Are You Affected?
Connect your repositories to instantly see whether vulnerable or malicious packages exist in your codebase.
Free. No credit card required.
I consent to receiving marketing communications based on Aikido’s Privacy Policy.
SOC 2Compliant
ISO 27001CompliantISO 42001Compliant
FedRAMPImplementing© All Intel data is openly available and commercially licensed.