# CVE-2026-63718 — Apache HTTP Server

> As of 2026-10-01, CVE-2026-63718 is a HIGH-severity vulnerability in Apache HTTP Server, CVSS v3.1 7.5, EPSS 0.4% (40.8th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-63718, most recently “Multiple Vulnerabilities in Apache HTTP Server 2.4.0 through 2.4.68 (20 CVEs, fixed in 2.4.69)”.

**Last updated:** 2026-10-01

## What is CVE-2026-63718?

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') response smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi and a crafted uwsgi response with Transfer-Encoding. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.68.

The record classifies CVE-2026-63718 under weakness class [CWE-444](https://intel.threadlinqs.com/cwe/CWE-444). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on integrity. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 22 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 40.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-01

## Is CVE-2026-63718 being exploited?

It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Apache Software Foundation](https://intel.threadlinqs.com/vendors/apache-software-foundation): Apache HTTP Server

## How to fix CVE-2026-63718

No vendor patch reference has been recorded for CVE-2026-63718 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-63718

1 tracked threat in the Threadlinqs corpus references CVE-2026-63718, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Multiple Vulnerabilities in Apache HTTP Server 2.4.0 through 2.4.68 (20 CVEs, fixed in 2.4.69)](https://intel.threadlinqs.com/threat/TL-2026-2876) — MEDIUM · 2026-10-02

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [httpd.apache.org — vendor advisory](https://httpd.apache.org/security/vulnerabilities_24.html)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-63718
Full detection coverage and IOCs for threats exploiting CVE-2026-63718 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp