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HighVulnerabilityupdated 27 Oct 2026, 12:23 UTC

Apache HTTP Server has several security flaws that could let attackers crash or take over the web server

Attackers may be able to crash the Apache web server, read data it should keep private, change files, or in some cases run their own code on it. The second advisory lists higher-privilege access and arbitrary code execution as possible outc

Official source
SeverityHighVulnerability
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official sourceBacked by an official source

What happened

Multiple vulnerabilities in Apache HTTP Server, classified as high severity by CERT-Bund (BSI). The advisories list denial of service, security bypass, information disclosure, file manipulation, privilege escalation and arbitrary code execution as possible impacts; the specific flaws are not detailed in the material.

Why it is dangerous: A successful attack could take websites offline, expose confidential information, or give an attacker control over the server, affecting any services hosted on it.

Are you affected?

You are affected if you run Apache HTTP Server; the affected versions are not specified in the advisory.

What to do

  1. Check which Apache HTTP Server version you run and compare it with the vendor's security advisory
  2. Install the vendor's latest patched Apache HTTP Server release as soon as it is available to you
  3. Review the CERT-Bund (BSI) advisory for the list of affected versions and any official mitigations

Timeline

  1. 27 Oct 2026, 12:16 UTC
    Publicly disclosed
  2. 27 Oct 2026, 12:16 UTC
    Reported by CERT-Bund (BSI) · CERT-Bund (BSI)
  3. 27 Oct 2026, 12:17 UTC
    Reported by CERT-Bund (BSI) · CERT-Bund (BSI)
  4. 27 Oct 2026, 12:18 UTC
    Picked up by Zero Radar

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
ZR-35cb41dc
Disclosed
27 Oct 2026, 12:16 UTC
On Zero Radar
27 Oct 2026, 12:18 UTC (2 min after disclosure)
Last change
27 Oct 2026, 12:23 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Apache HTTP Server has several security flaws that could let attackers crash or take over the web server · Zero Radar