Public proof of conceptFix available

CVE-2024-40898

Q: Is CVE-2024-40898 actively exploited?

Active exploitation of CVE-2024-40898 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2024-40898?

CVE-2024-40898 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

A public proof of concept exists; no exploitation attested.

Published2024-07-18
Fixed in2.4.62
WeaknessCWE-918

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

SSRF in Apache HTTP Server on Windows with mod_rewrite in server/vhost context, allows to potentially leak NTML hashes to a malicious server via SSRF and malicious requests. Users are recommended to upgrade to version 2.4.62 which fixes this issue.

Timeline

dates in UTC

2024-07-1810:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-40898?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-40898?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV · CISA-ADP

Apache HTTP Serverversion to verify

Branch	Affected	Fixed in	Source
2.4	< 2.4.62	2.4.62	NVD
2.4	≥ 2.4.0, < 2.4.62	2.4.62	OSV

Apache apache http server

Branch	Affected	Fixed in	Source
2.4	≥ 2.4.0, ≤ 2.4.61	no fix published	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apache HTTP Server to 2.4.62

Advisories and patches

httpd.apache.orgVendor Advisory

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedanilpatel199n/CVE-2024-40898ForceEA001/CVE-2024-40898-SSL-Bypass-Detection

Sources

CISA-ADPSSVC decisionnone2024-07-20
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.12024-07-18
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-918read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2024-07-18
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2024-40898?

Is CVE-2024-40898 actively exploited?

Active exploitation of CVE-2024-40898 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-40898?

CVE-2024-40898 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Running Apache HTTP Server? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database