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2834 articles · 164367 vulns · 36/41 feeds (7d)
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8.1
CVE-2026-42530EXPLOITEDPATCHED
f5 · nginx open source

NGINX Open-Source ngx_http_v3_module vulnerability

Description

NGINX Open Source has a vulnerability in the ngx_http_v3_module module. When NGINX Open Source is configured to use the HTTP/3 QUIC module, a remote unauthenticated attacker along with conditions beyond their control can use a specially crafted HTTP/3 session to reopen a QPACK encoder stream. This may cause a Use-after-Free in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected Products

VendorProductVersions
f5nginx open source1.31.0

References

  • https://my.f5.com/manage/s/article/K000161616(vendor-advisory)

Related News (1 articles)

Tier C
VulDB7h ago
CVE-2026-42530 | F5 NGINX Open Source up to 1.31.1 QUIC use after free (K000161616)
→ No new info (linked only)
CVSS 3.18.1 HIGH
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
1.31.2
CWECWE-416
PublishedJun 17, 2026
Last enriched6h agov2
Trending Score50
Source articles1
Independent1
Info Completeness9/14
Missing: epss, kev, exploit, iocs, mitre_attack

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Related CVEs (5)

CRITICALCVE-2026-42945EXPKEV
NGINX ngx_http_rewrite_module vulnerability
Trending: 95
HIGHCVE-2026-11311EXP
NGINX Gateway Fabric vulnerability
Trending: 50
CRITICALCVE-2026-48142EXP
NGINX ngx_http_charset_module vulnerability
Trending: 48
HIGHCVE-2026-42055
NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability
Trending: 31
PRE-CVE
Multiple Vulnerabilities in F5 and NGINX Products
Trending: 20

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Jun 17, 2026
Discovered by ZDM
Jun 17, 2026
Updated: description, affectedVersions, severity, activelyExploited
Jun 17, 2026
Actively Exploited
Jun 17, 2026
Patch Available
Jun 17, 2026

Version History

v2
Last enriched 6h ago
v2Tier C6h ago

Updated description with new details, changed severity to CRITICAL, and added affected version 1.31.1.

descriptionaffectedVersionsseverityactivelyExploited
via VulDB
v17h ago

Initial creation