What is CVE-2026-23918?
Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
The record classifies CVE-2026-23918 under weakness class CWE-415. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 176 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 49.7% probability of exploitation in the next 30 days, higher than 98.8% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-05-04, last modified 2026-07-15
Is CVE-2026-23918 being exploited?
Weaponised exploit code for CVE-2026-23918 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.
- striga-ai/CVE-2026-23918 (github)
- xeloxa/CVE-2026-23918-Apache-H2-PoC (github)
- rhasan-com/CVE-2026-23918 (github)
- qassam-315/CVE-2026-23918-Elite-Auditor (github)
- 12lie20/CVE-2026-23918-test (github)
- hackervlogofficial/CVE-2026-23918 (github)
- alt3kx/CVE-2026-23918 (github)
- rshosting/Apache-CVE-2026-23918-fix (github)
Affected products and versions
- Apache Software Foundation: Apache HTTP Server
How to fix CVE-2026-23918
Vendor advisory: https://httpd.apache.org/security/vulnerabilities_24.html. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-23918
1 tracked threat in the Threadlinqs corpus references CVE-2026-23918, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.