CVE-2024-40898 | Apache HTTP Server: SSRF with mod_rewrite in server/vhost context on Windows

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. 

Published: 2024-07-18 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-40898 is rated Moderate Risk (55.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.54%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-40898

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.73% 1.54% +0.80%
2 2026-05-01 0.47% 0.73% +0.26%
3 2026-03-04 — 0.47% —

Full EPSS history (34 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-40898

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-40898

OS Trackers for CVE-2024-40898

vendor priority summary link
alpine — CVE-2024-40898: 1 source package rows (apache2); 7 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2024-40898
debian unimportant CVE-2024-40898 unimportant priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-40898
gentoo low CVE-2024-40898: 1 GLSA(s) (202409-31), 1 atom(s) (www-servers/apache); latest impact low. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2024-40898
redhat high — https://access.redhat.com/security/cve/CVE-2024-40898
suse medium CVE-2024-40898 severity moderate: SUSE including 21 source package names (apache2, apache2-2.4.62-1.1, …), 156 product×package rows across 37 product lines (SUSE Enterprise Storage 7.1, SUSE Linux Enterprise High Performance Computing 12 SP5, … (37 product lines)): Known Not Affected 143, Fixed 13. https://www.suse.com/security/cve/CVE-2024-40898/
ubuntu medium CVE-2024-40898 medium priority: Ubuntu including 1 source packages (apache2), 7 status rows across 7 suites (bionic, focal, jammy, noble, trusty, upstream, xenial): not-affected 6, needs-triage 1. https://ubuntu.com/security/CVE-2024-40898

Affected software / configurations for CVE-2024-40898

Vendor Product Version Raw CPE
apache http_server < 2.4.62 cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

References for CVE-2024-40898

cvelogic Threat Intelligence