PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-56449 Apache Software Foundation CVE debrief

CVE-2026-56449 is an Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies. This issue affects Apache HTTP Server version 2.4.68. The vulnerability can be triggered by a crafted HTTP response body, which could lead to potential impact on Apache HTTP Server deployments. Defenders responsible for Apache HTTP Server deployments should assess exposure and potential impact, and prioritize patching or mitigating the vulnerability. The CVE record and NVD entry provide details on the vulnerability, but additional information on exploitation or impact is limited.

Vendor
Apache Software Foundation
Product
Apache HTTP Server
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-01
Original CVE updated
2026-10-21
Advisory published
2026-10-01
Advisory updated
2026-10-21

Who should care

Defenders responsible for Apache HTTP Server deployments should assess exposure and potential impact. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify exposure and prioritize patching or mitigating the vulnerability.

Why it matters

CVE-2026-56449 is an Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies. Defenders responsible for Apache HTTP Server deployments should assess exposure and potential impact, and prioritize patching or mitigating the vulnerability.

  • Verify exposure and potential impact on Apache HTTP Server deployments
  • Assess and prioritize patching or mitigating the vulnerability

Technical summary

The vulnerability is an Out-of-bounds Write issue in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies, affecting version 2.4.68. This vulnerability can be triggered by a crafted HTTP response body, which could lead to potential impact on Apache HTTP Server deployments. Defenders should prioritize verifying exposure and assessing potential impact on Apache HTTP Server deployments.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact on Apache HTTP Server deployments.

Recommended defensive actions

  • Verify Apache HTTP Server version and check for exposure
  • Assess potential impact on deployments
  • Monitor for updates from Apache

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on exploitation or impact is limited. There is no evidence of exploitation in the wild, but defenders should verify exposure and assess potential impact on Apache HTTP Server deployments. The vulnerability affects Apache HTTP Server version 2.4.68, and defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56449 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56449

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-56449 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56449

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.