CVE-2026-34356
An attacker can exploit multiple vulnerabilities in Apache HTTP Server to execute arbitrary code, bypass security measures, conduct cross-site scripting attacks, alter and disclose data, cause a denial-of-service condition, or carry out other unspecified attacks.
CSIRTS triage
- What
- Multiple vulnerabilities allow attackers to execute arbitrary code, bypass security measures, conduct cross-site scripting attacks, alter and disclose data, cause denial-of-service conditions, or carry out other unspecified attacks.
- Who is affected
- Users of Apache HTTP Server are affected.
- Urgency
- Remediation is high urgency due to the critical nature of the vulnerabilities.
- Action
- Update Apache HTTP Server to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all EPSS-scored CVEs.
Advisory coverage (5)
- high[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilitiescert-bund · 2026-08-25
- high[NEW] [high] Oracle Solaris third-party components: Multiple vulnerabilitiescert-bund · 2026-08-11
- unknownUSN-8571-1: Apache HTTP Server vulnerabilitiesubuntu · 2026-07-20
- unknownUSN-8516-1: Apache HTTP Server vulnerabilitiesubuntu · 2026-07-08
- highCVE-2026-34356: Apache HTTP Server: ProxyPassReverseCookieMap buffer overflowmsrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-34356)