Critical Alert 1 Active Exploit Detected Today

CVE-2026-86950 — Apple Multiple Products Out-of-Bounds Write Vulnerability →
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September 30, 2026

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CVE-2026-27651NVD

Vulnerability Summary

When the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity Level
HIGH(7.5)
Published Date
Mar 24, 2026
Last Modified
Jul 15, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.94%Probability
Root Weakness (CWE)
CWE-476: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 8.7 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)None
Integrity (Vulnerable System)None
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • F5 NGINX Open Source >= 1.29.0 and < 1.29.7
  • F5 NGINX Open Source >= 0.5.15 and < 1.28.3
  • F5 NGINX Plus >= R36 and < R36 P3
  • F5 NGINX Plus >= R35 and < R35 P2
  • F5 NGINX Plus >= R34 and < *
  • F5 NGINX Plus >= R33 and < *
  • F5 NGINX Plus >= R32 and < R32 P5
Patched Versions
  • F5 NGINX Open Source 1.29.7
  • F5 NGINX Open Source 1.28.3
  • F5 NGINX Plus R36 P3
  • F5 NGINX Plus R35 P2
  • F5 NGINX Plus *
  • F5 NGINX Plus R32 P5
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🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References