Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing authentication via crafted requests. Users are recommended to upgrade to version 2.4.60, which fixes this issue.
CVE-2024-38473
Score elevated to 9.0 because EPSS predicts 88% probability of exploitation within the next 30 days (top 0.5% of all CVEs). NVD baseline CVSS 8.1 retained for reference. Confidence: see factors.
- 23 internet-exposed hosts are running an affected version right now
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
23 internet-exposed hosts are running an affected version of CVE-2024-38473 right now.
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- CVSS v3
- 8.1
- EG Score
- 9.0(high)
- EPSS
- 97.8%
- KEV
- Not listed
Published
July 1, 2024
Last Modified
July 1, 2025
References (5)
- security@apachehttps://httpd.apache.org/security/vulnerabilities_24.html
- security@apachehttps://security.netapp.com/advisory/ntap-20240712-0001/
- af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/07/01/6
- af854a3a-2127-422b-91ae-364da2661108https://httpd.apache.org/security/vulnerabilities_24.html
- af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240712-0001/
Vendor Advisories for CVE-2024-38473(6)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- CVE-2024-38473Microsoft Security Response Center (MSRC)High
Apache HTTP Server proxy encoding problem
- RHSA-2024:5239Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 SP5 security update
- RHSA-2024:5240Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 SP5 security update
- RHSA-2024:5001Red Hat Product SecurityMedium
Red Hat Security Advisory: httpd security update
- RHSA-2024:4726Red Hat Product SecurityHigh
Red Hat Security Advisory: httpd security update
- RHSA-2024:4720Red Hat Product SecurityHigh
Red Hat Security Advisory: httpd:2.4 security update
Patch Availability(6)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | libapache2-mod-proxy-uwsgi (2.4.57-2ubuntu2.5) @ mantic | 2026-05-23 | ubuntu |
| redhat | jbcs-httpd24-httpd | 2024-08-13 | redhat |
| redhat | jbcs-httpd24-mod_security-0:2.9.3-40.el7jbcs | 2024-08-13 | redhat |
| redhat | httpd-0:2.4.53-11.el9_2.10 | 2024-08-06 | redhat |
| redhat | httpd:2.4-8100020240712114234.489197e6 | 2024-07-23 | redhat |
| redhat | httpd-0:2.4.57-11.el9_4 | 2024-07-23 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(1)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 9× in last 7d / 39× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:07 UTCEPSS rescore
- 2026-07-22 14:07 UTCEPSS rescore
- 2026-07-21 15:23 UTCEPSS rescore
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- 2026-07-15 01:59 UTCEPSS rescore
- 2026-07-15 01:59 UTCEPSS rescore
- 2026-07-14 03:10 UTCOSV refresh
- 2026-07-13 22:29 UTCEPSS rescore
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- 2026-07-11 08:26 UTCEPSS rescore
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- 2026-07-07 13:45 UTCEPSS rescore
- 2026-07-06 16:26 UTCEPSS rescore
- 2026-07-06 02:22 UTCEPSS rescore
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- 2026-07-04 06:30 UTCEPSS rescore
- 2026-07-01 15:05 UTCEPSS rescore
- 2026-06-28 14:06 UTCEPSS rescore
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- 2026-06-28 04:55 UTCEPSS rescore
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- 2026-06-27 03:07 UTCEPSS rescore
- 2026-06-27 03:07 UTCEPSS rescore
- 2026-06-26 00:46 UTCOSV refresh
- 2026-06-25 13:49 UTCEPSS rescore
- 2026-06-24 14:04 UTCEPSS rescore
- 2026-06-24 14:04 UTCEPSS rescore
- 2026-06-23 21:32 UTCEPSS rescore
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- 2026-06-22 14:25 UTCEPSS rescore
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- 2026-06-15 17:47 UTCEPSS rescore
- 2026-06-14 23:16 UTCEPSS rescore
- 2026-06-13 22:59 UTCEPSS rescore
- 2026-06-13 22:59 UTCEPSS rescore
- 2026-06-12 23:11 UTCEPSS rescore
- 2026-06-10 22:17 UTCEPSS rescore
- 2026-06-10 13:21 UTCEPSS rescore
- 2026-06-08 14:16 UTCEPSS rescore
- 2026-06-08 14:11 UTCOSV refresh
- 2026-06-07 15:24 UTCEPSS rescore
- 2026-06-07 15:24 UTCEPSS rescore
- 2026-06-06 13:46 UTCEPSS rescore
- 2026-06-06 13:46 UTCEPSS rescore
- 2026-06-05 22:46 UTCEPSS rescore
- 2026-06-05 22:46 UTCEPSS rescore
- 2026-06-05 06:09 UTCEPSS rescore
- 2026-06-05 06:09 UTCEPSS rescore
- 2026-06-01 13:51 UTCEPSS rescore
- 2026-06-01 13:51 UTCEPSS rescore
- 2026-05-28 13:44 UTCEPSS rescore
- 2026-05-28 13:44 UTCEPSS rescore
- 2026-05-28 13:44 UTCEPSS rescore
- 2026-05-26 13:43 UTCEPSS rescore
- 2026-05-26 13:43 UTCEPSS rescore
- 2026-05-26 07:18 UTCEPSS rescore
- 2026-05-26 07:18 UTCEPSS rescore
- 2026-05-26 07:18 UTCEPSS rescore
- 2026-05-23 23:05 UTCEG score recompute
- 2026-05-23 23:05 UTCVendor advisory
- 2026-05-23 23:05 UTCGHSA enrichment
Publicly available exploits
(3 references)Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCjuanschallibaum/CVE-2024-38473-Nuclei-TemplateFirst seen Aug 23, 2024
Nuclei template to detect Apache servers vulnerable to CVE-2024-38473
Open source ↗ - Open source ↗GitHub PoCAbdurahmon3236/CVE-2024-38473First seen Aug 2, 2024
- Nucleihttp/cves/2024/CVE-2024-38473.yamlFirst seen Jan 1, 2024
Apache HTTP Server - ACL Bypass
Open source ↗
Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat · msrc
Same CWE
10 shownCWE-116
Frequently asked(5)
What is CVE-2024-38473?
When was CVE-2024-38473 disclosed?
Is CVE-2024-38473 actively exploited?
What is the CVSS score of CVE-2024-38473?
How do I remediate CVE-2024-38473?
Dependency Blast Radius
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