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CVE-2026-77831: ash_paper_trail

Severity

2.1 (LOW)

Vendor

ASH-PROJECT

Affected versions

0.1.1 through before 0.7.0; 449cd2a93416853066378fa61c715e89f80dc854 through before e781f5d8840b07d57db99f9a4728298837d7

Fixed version

0.7.0.

Patch status

Patched

Published

2026-08-30T01:20:29.597

Modified

2026-08-30T01:20:29.597

Why it matters

This matters because the affected product may allow code execution. Prioritize systems that are internet-facing or have privileged access to other infrastructure.

Recommended admin actions

• Review during normal vulnerability triage unless the affected system is internet-facing or business-critical.
• Compare installed versions against the affected version range in the advisory.
• Review logs for suspicious activity related to the affected application or component.

Technical summary

Inefficient Algorithmic Complexity vulnerability in ash-project ash_paper_trail allows a user who can submit a large array attribute to a paper-trailed create or update action to cause a denial of service through excessive CPU and memory use. With full-diff change tracking, AshPaperTrail.ChangeBuilders.FullDiff.ListChange pairs each prior array element against the new list by rebuilding the remaining-elements accumulator with acc ++ [tuple] on every step, copying the growing list each time, so the pairing scales cubically in the array length. Nothing bounds the length and the value comes straight from action input, so one request carrying a large accepted {:array, _} attribute forces tens of seconds of CPU and multi-gigabyte allocations. This issue affects ash_paper_trail: from 0.1.1 before 0.7.0.

View the official NVD record for CVE-2026-77831

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.