onyx

onyx --cves cve-2019-9511

CVE-2019-9511

HIGHPOCnginx
score
<0.1
cvss
7.5
epss
59.5%
published
2019-08-13
kev added
—
first seen

Some HTTP/2 implementations contain a denial of service caused by window size and stream prioritization manipulation, letting attackers cause excessive resource consumption, exploit requires attacker to send large data over multiple streams and manipulate window size and stream priority.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2019-08-13 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 59.5%2026-09-23: epss 59.5%2026-09-24: epss 59.5%2026-09-25: epss 59.5%2026-09-26: epss 59.5%2026-09-27: epss 59.5%2026-09-28: epss 59.5%2026-09-29: epss 59.5%2026-09-30: epss 59.5%2026-10-01: epss 59.5%2026-10-02: epss 59.5%2026-10-03: epss 59.5%2026-10-04: epss 59.5%2026-10-05: epss 59.5%2026-10-06: epss 59.5%2026-10-07: epss 59.5%2026-10-08: epss 59.5%2026-10-09: epss 59.5%2026-10-10: epss 59.5%2026-10-11: epss 59.5%2026-10-12: epss 59.5%2026-10-13: epss 59.5%2026-10-14: epss 59.5%2026-10-15: epss 59.5%2026-10-16: epss 59.5%2026-10-18: epss 59.5%2026-10-19: epss 59.5%2026-10-20: epss 59.5%2026-10-21: epss 59.5%59.5%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx
  3. Public PoC

Exploit availability

Public PoC flagged by vulnx; no direct exploit link among the citations.

Weaknesses

CWE-400 CWE-770

References 29

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