Critical Alert 4 Active Exploits Detected Today

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CVE-2026-76519 — Cisco Secure Email Gateway Relative Path Traversal Vulnerability →
CVE-2026-105133 — Ahsay AhsayCBS Improper Authentication Vulnerability →
CVE-2026-0322 — Palo Alto Networks PAN-OS Code Injection Vulnerability →
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October 15, 2026

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CVE-2026-34183NVD

Vulnerability Summary

Issue summary: Remote peer may exhaust heap memory of the QUIC
server or client by flooding it with packets containing PATH_CHALLENGE
frames.

Impact summary: A malicious remote peer can cause an unbounded
memory allocation which can lead to an abnormal termination of the
application acting as a QUIC client or server and a Denial of Service.

A remote peer may exhaust heap memory by flooding the local
QUIC stack with PATH_CHALLENGE frames. The local QUIC stack
allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.
The allocated PATH_RESPONSE frame gets freed only when the remote
peer acknowledges reception of the PATH_RESPONSE frame which will
not be done by a malicious peer.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by
this issue. The QUIC stack is outside of OpenSSL FIPS module
boundary.
Severity Level
HIGH(7.5)
Published Date
Jun 9, 2026
Last Modified
Jul 23, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
1.05%Probability
Root Weakness (CWE)
CWE-1325: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
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
  • Openssl Openssl >= 3.4.0 and < 3.4.6
  • Openssl Openssl >= 3.5.0 and < 3.5.7
  • Openssl Openssl >= 3.6.0 and < 3.6.3
  • Openssl Openssl
Patched Versions
  • Openssl Openssl 3.4.6
  • Openssl Openssl 3.5.7
  • Openssl Openssl 3.6.3
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🎁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.
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External References