[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilities

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.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

high

Published

2026-07-09

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1824

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Elevated exploitation riskCVE-2026-4997511.5% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 96% of all scored CVEs.
• Low exploitation riskCVE-2026-291670.66% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all scored CVEs.
• Low exploitation riskCVE-2026-291700.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.
• Low exploitation riskCVE-2026-343550.80% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all scored CVEs.
• Low exploitation riskCVE-2026-343560.68% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all scored CVEs.
• Low exploitation riskCVE-2026-425350.54% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
• Low exploitation riskCVE-2026-425360.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 49% of all scored CVEs.
• Low exploitation riskCVE-2026-439510.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
• Low exploitation riskCVE-2026-441190.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.
• Low exploitation riskCVE-2026-441850.60% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[UPDATE] [high] HTTP/2 implementations: Vulnerability allows denial of servicecert-bund
• unknownUSN-8516-1: Apache HTTP Server vulnerabilitiesubuntu
• unknownZimbra Denial of Service Vulnerabilityhkcert
• mediumCVE-2026-44119: Apache HTTP Server: escalation of privilege through expressions in .htaccess in multiple modul…msrc
• mediumCVE-2026-29170: Apache HTTP Server: mod_proxy_ftp XSSmsrc
• mediumCVE-2026-43951: Apache HTTP Server: OOB Read in `merge_response_headers` can cause crashmsrc
• highCVE-2026-29167: Apache HTTP Server: mod_ldap per-dir use-after-freemsrc
• highCVE-2026-42535: Apache HTTP Server: mod_dav_fs protected directory accessmsrc
• criticalCVE-2026-44631: Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflowmsrc
• mediumCVE-2026-44186: Apache HTTP Server: Loop in `proxy_ftp_handler` in mod_proxy_ftpmsrc
• highCVE-2026-34356: Apache HTTP Server: ProxyPassReverseCookieMap buffer overflowmsrc
• highCVE-2026-44185: Apache HTTP Server: Stack Buffer Over-Read in mod_ssl OCSP `send_request`msrc

Recent advisories for Apache HTTP Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• high[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilitiescert-bund · 2026-07-09
• high[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilitiescert-bund · 2026-07-09
• unknownUSN-8516-1: Apache HTTP Server vulnerabilitiesubuntu · 2026-07-08
• mediumCVE-2026-56139: Generation of Error Message Containing Sensitive Information vulnerability in Apache Camel Und…nvd · 2026-07-06
• mediumCVE-2026-49365: Generation of Error Message Containing Sensitive Information vulnerability in Apache Camel Net…nvd · 2026-07-06
• highexploited[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilitiescert-bund · 2026-07-02

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