[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in Apache HTTP Server to gain elevated privileges, execute arbitrary code, bypass security measures, disclose confidential information, or cause a Denial of Service state.
CSIRTS triage
- What
- An attacker can exploit multiple vulnerabilities to gain elevated privileges, execute arbitrary code, bypass security measures, disclose confidential information, or cause a Denial of Service state.
- Who is affected
- Deployments of Apache HTTP Server with the affected versions.
- Urgency
- Remediation is high urgency due to the severity and potential impact of the vulnerabilities.
- Action
- Upgrade to the latest version of Apache HTTP Server.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1354
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-2026-2391849.7% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 99% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-240720.65% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all EPSS-scored CVEs.
- Moderate exploitation riskCVE-2026-287801.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 70% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-291680.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-291690.59% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-330060.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-330070.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-335230.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-338570.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-340320.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-23918 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-24072 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-28780 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-29168 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-29169 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-33006 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-33007 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-33523 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-33857 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-34032 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-34059 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Apple macOS (Tahoe, Sonoma, and Sequoia): Multiple vulnerabilitiescert-bund
- mediumCVE-2026-33857: Apache HTTP Server: Off-by-one OOB reads in AJP getter functionsmsrc
- highCVE-2026-29168: Apache HTTP Server: mod_md unrestricted OCSP responsemsrc
- highCVE-2026-24072: Apache HTTP Server: mod_rewrite elevation of privileges via ap_exprmsrc
- mediumCVE-2026-33007: Apache HTTP Server: mod_authn_socache crashmsrc
- mediumCVE-2026-34032: Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check…msrc
- mediumCVE-2026-33006: Apache HTTP Server: mod_auth_digest timing attackmsrc
- highCVE-2026-34059: Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_parse_data()msrc
- mediumCVE-2026-33523: Apache HTTP Server: multiple modules: HTTP response splitting forwarding malicious status linemsrc
- highCVE-2026-29169: Apache HTTP Server: mod_dav_lock indirect lock crashmsrc
- highCVE-2026-23918: Apache HTTP Server: http2: double free and possible RCE on early resetmsrc
- unknownMultiple vulnerabilities in Tenable products (August 4, 2026)cert-fr-avis
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 · 2026-08-25
- highCVE-2026-54789: mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache…nvd · 2026-08-21
- mediumCVE-2026-63044: Server-Side Request Forgery (SSRF) vulnerability in Apache InLong. Any authenticated user (no …nvd · 2026-08-20
- high[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilitiescert-bund · 2026-08-20
- medium[UPDATE] [medium] Apache HTTP Server: Multiple Vulnerabilities Allow Data Manipulationcert-bund · 2026-08-20
- highexploited[UPDATE] [high] Apache HTTP Server: Multiple vulnerabilitiescert-bund · 2026-08-20
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