Score 6.5 from GitHub Security Advisory published 2026-08-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.
A fix is available — apply it.
It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive resource usage and potential denial of service.
This issue affects Apache Qpid Proton-J: through 0.34.1.
Users are recommended to upgrade to version 0.35.0, which fixes the issue.
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
CISA SSVCTrack at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
August 5, 2026
August 7, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 141 total refreshes for this CVE.
Explore the affected products and dependency analysis for CVE-2026-66277
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.