Vulnerability · Published Aug 30, 2026 · Assigned by EEF
CVE-2026-77970Sensitive fields nested in embedded values are not redacted in AshPaperTrail versions
Medium 5.9
In plain English
A medium-severity security flaw in ash_paper_trail from ash-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ash-project | ash_paper_trail | 0.3.0 – before 0.7.0 |
| ash-project | ash_paper_trail | ffe5e03b14d26b73bff17f3eca811591788aba9c – before 0cd4acfe7f48397673d8594fb5e2cd0f1bda6e40 |
Weakness: CWE-312 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/ash-project/ash_paper_trail/security/advisories/GHSA-v645-6jm6-cgpj vendor-advisory, related
- https://cna.erlef.org/cves/CVE-2026-77970.html related
- https://osv.dev/vulnerability/EEF-CVE-2026-77970 related
- https://github.com/ash-project/ash_paper_trail/commit/0cd4acfe7f48397673d8594fb5e2cd0f1bda6e40 patch