CVE-2026-77970 Sensitive fields nested in embedded values are not redacted in AshPaperTrail versions
Attackers with read access can recover sensitive nested data from version history because redaction logic fails to descend into embedded resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-77970?
CVE-2026-77970 is a medium-severity vulnerability in ash-project ash_paper_trail, published on 30 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Cleartext Storage of Sensitive Information vulnerability in ash-project ash_paper_trail allows an attacker with read access to the generated version resource to recover sensitive values nested inside embedded resources, unions, or lists.
sensitive_attributes :redact and :ignore only act on the tracked resource's top-level attributes. maybe_redact_changes/3 and the stored-action-input path in AshPaperTrail.Resource.Changes.CreateNewVersion derive the sensitive set from the resource's own attributes and never descend into embedded, union, or list values, so a non-sensitive attribute or action argument that holds an embed with a sensitive? field (for example an accepted credentials embed carrying a token) is written to the version table in cleartext.
This issue affects ash_paper_trail: from 0.3.0 before 0.7.0.
Weakness: CWE-312
Which versions are affected by CVE-2026-77970?
1 open source package ship an affected version, including ash_paper_trail.
| Package | Affected | Fixed in |
|---|---|---|
ash_paper_trail Hex | From 0.3.0 | 0.7.0 |
How do I fix CVE-2026-77970?
Upgrade ash_paper_trail to 0.7.0 or later.
Is CVE-2026-77970 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77970 exists.
Sources
Also known as EEF-CVE-2026-77970, GHSA-v645-6jm6-cgpj.