# CVE-2026-77970

## Summary

- **CVE ID:** CVE-2026-77970
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (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)
- **CWE:** CWE-312
- **Published:** Aug 30, 2026
- **Last Modified:** Aug 31, 2026

## 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

- ash-project — ash_paper_trail (0.3.0)
- ash-project — ash_paper_trail (ffe5e03b14d26b73bff17f3eca811591788aba9c)

## References

- [CNA](https://github.com/ash-project/ash_paper_trail/security/advisories/GHSA-v645-6jm6-cgpj)
- [CNA](https://cna.erlef.org/cves/CVE-2026-77970.html)
- [CNA](https://osv.dev/vulnerability/EEF-CVE-2026-77970)
- [CNA](https://github.com/ash-project/ash_paper_trail/commit/0cd4acfe7f48397673d8594fb5e2cd0f1bda6e40)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-09._