CVE-2026-21720
Unauthenticated DoS: avatar cache leaks goroutines when /avatar/:hash requests time out
7.5
HIGH
CVSS 3.1
EPSS 0.62%
描述
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.
如何修補 CVE-2026-21720
要修補 CVE-2026-21720,請將受影響套件升級到下列已修補版本。
- —升級至 11.6.9 或更新版本
CVE-2026-21720 正在被利用嗎?
低 — EPSS 為 0.6%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- >= 3.0.0, < 11.6.9, >= 12.0.0, < 12.0.8, >= 12.1.0, < 12.1.5, >= 12.2.0, < 12.2.3, >= 12.3.0, < 12.3.1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |