Answer in brief
CVE-2026-77831 records a Low severity (CVSS 2.1) vulnerability in Algorithmic-complexity denial of service in AshPaperTrail full-diff list tracking. The current sources do not mark it as known exploited. The current feed maps ash-project/ash_paper_trail (generic), ash-project/ash_paper_trail (generic), ash-project/ash-project/ash_paper_trail (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 2.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps ash-project/ash_paper_trail (generic), ash-project/ash_paper_trail (generic), ash-project/ash-project/ash_paper_trail (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ash-project/ash_paper_trailgeneric | >=449cd2a93416853066378fa61c715e89f80dc854 <e781f5d8840b07d57db99f9a4728298837d7b3a8 | e781f5d8840b07d57db99f9a4728298837d7b3a8 |
| ash-project/ash_paper_trailgeneric | >=0.1.1 <0.7.0 | 0.7.0 |
| ash-project/ash-project/ash_paper_trailgeneric | >=449cd2a93416853066378fa61c715e89f80dc854 <e781f5d8840b07d57db99f9a4728298837d7b3a8 | e781f5d8840b07d57db99f9a4728298837d7b3a8 |
Published upstream
Aug 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 30, 2026
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.
Quoted source text, attributed separately from HOL analysis.