October 8, 2026

CVE Watchtower

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CVE-2026-42934NVD

Vulnerability Summary

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.



 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity Level
MEDIUM(4.8)
Published Date
May 13, 2026
Last Modified
Jun 8, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.72%Probability
Root Weakness (CWE)
CWE-125: Out-of-bounds Read ↗
The software reads data past the end, or before the beginning, of the intended buffer.
CVSS v4.0 Base Metrics — Score 6.3 (MEDIUM)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsPresent
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)Low
Integrity (Vulnerable System)None
Availability (Vulnerable System)Low
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
CVSS v3.1 Base Metrics — Score 4.8 (MEDIUM)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • F5 NGINX Plus >= R36 and < R36 P4
  • F5 NGINX Plus >= R32 and < R32 P6
  • F5 NGINX Open Source >= 0.3.50 and < 1.30.1
Patched Versions
  • F5 NGINX Plus R36 P4
  • F5 NGINX Plus R32 P6
  • F5 NGINX Open Source 1.30.1
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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