Search threats, CVEs… ⌘K
Back to vendor advisories
Microsoft Security Response CenterCVE-2026-63385

Libevent: HTTP header handling bugs create risk of access control bypass.

Mariner

Read the vendor bulletin Get alerts for azl3 libevent 2.1.12-1 on Azure Linux
CriticalCVSS not listedCritical severity
Scope

What the vendor says is affected

  • azl3 libevent 2.1.12-1 on Azure Linux 3.0
  • azl3 lldpd 1.0.22-1 on Azure Linux 3.0
  • azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0
  • azl3 mysql 8.0.46-1 on Azure Linux 3.0
  • azl3 ntp 4.2.8p17-2 on Azure Linux 3.0
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • Added affected products: azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0, azl3 lldpd 1.0.22-1 on Azure Linux 3.0, azl3 mysql 8.0.46-1 on Azure Linux 3.0, azl3 ntp 4.2.8p17-2 on Azure Linux 3.0.
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-63385View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor