https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-03T11:32:45.873906+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-21720 CVE-2026-21720 — Unauthenticated DoS: avatar cache leaks goroutines when /avatar/:hash requests time out 2026-10-03T11:32:45.877425+00:00

Affected: grafana/grafana-enterprise, grafana/grafana, Red Hat Ceph Storage 7, Red Hat Ceph Storage 8, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9

Every uncached /avatar/:hash request spawns a goroutine that refreshes the Gravatar image. If the refresh sits in the 10-slot worker queue longer than three seconds, the handler times out and stops listening for the result, so that goroutine blocks forever trying to send on an unbuffered channel. Sustained traffic with random hashes keeps tripping this timeout, so goroutine count grows linearly, eventually exhausting memory and causing Grafana to crash on some systems.