onyx

onyx --cves cve-2026-47774

CVE-2026-47774

HIGHPOCEnvoy Proxy
score
1.4
cvss
7.5
epss
1.1%
published
2026-06-17
kev added
—
first seen

Envoy < 1.35.11, 1.36.7, 1.37.3, and 1.38.1 contains a denial of service caused by improper accounting of cookie header bytes and HPACK header block limits in HTTP/2 downstream request processing, letting unauthenticated remote clients trigger excessive memory consumption and OOM termination, exploit requires crafted HTTP/2 requests.

Timeline

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

events2026-06-17 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score 1.41.4epss2026-09-22: epss 1.0%2026-09-23: epss 1.0%2026-09-24: epss 1.1%2026-09-25: epss 1.1%2026-09-26: epss 1.1%2026-09-27: epss 1.1%2026-09-29: epss 1.1%2026-09-30: epss 1.1%2026-10-01: epss 1.1%2026-10-02: epss 1.1%2026-10-03: epss 1.1%2026-10-04: epss 1.1%2026-10-05: epss 1.1%2026-10-06: epss 1.1%2026-10-07: epss 1.1%2026-10-08: epss 1.1%2026-10-09: epss 1.1%2026-10-10: epss 1.1%2026-10-11: epss 1.1%2026-10-12: epss 1.1%2026-10-13: epss 1.1%2026-10-14: epss 1.1%2026-10-15: epss 1.1%2026-10-16: epss 1.1%2026-10-18: epss 1.1%2026-10-19: epss 1.1%2026-10-20: epss 1.1%2026-10-21: epss 1.1%1.1%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-405 CWE-409

References 10