CVE-2019-10098
MediumExploitedPublic exploitIn Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL.
Published Apr 21, 2021 · Updated Aug 4, 2026 · Also known as ALPINE-CVE-2019-10098, DEBIAN-CVE-2019-10098, UBUNTU-CVE-2019-10098
Key Facts
Patch immediately- CVE-2019-10098 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting HTTP Server (Apache), apache2 (alpine), rootio-apache2 and 22 more products.
- It is exploited in the wild, listed in Industry KEV feed since Feb 22, 2022. Public exploit code is available.
- EPSS estimates a 74% probability of exploitation in the next 30 days.
- Fixed versions are available, including HTTP Server <=2.4.39, apache2 2.4.10-10+deb8u15, apache2 2.4.18-2ubuntu3.12.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
74%
Higher than 99.4% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-10098 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Feb 22, 2022 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
149 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| HTTP ServerApache | >= 2.4.0 to 2.4.39 | 2.4.39 |
| apache2alpine | See advisory | 2.4.41-r0 |
| rootio-apache2rootio | See advisory | 2.4.41-1 |
| mod_mdalma | See advisory | 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa |
| httpd24-develamazon | See advisory | 2.4.41-1.88.amzn1 |
Patched Releases
HTTP Server
<=2.4.39
apache2
2.4.10-10+deb8u15, 2.4.18-2ubuntu3.12, 2.4.23-29.43.1, 2.4.25-3+deb9u8, 2.4.29-1ubuntu4.10, 2.4.33-3.21.1, 2.4.33-lp151.8.6.1, 2.4.38-3+deb10u1, 2.4.41-1, 2.4.41-1ubuntu1, 2.4.41-r0, 2.4.49-1.1
apache2-devel
2.4.23-29.43.1, 2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-doc
2.4.23-29.43.1, 2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-event
2.4.33-lp151.8.6.1
apache2-example-pages
2.4.23-29.43.1, 2.4.33-lp151.8.6.1
apache2-prefork
2.4.23-29.43.1, 2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-utils
2.4.23-29.43.1, 2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-worker
2.4.23-29.43.1, 2.4.33-3.21.1, 2.4.33-lp151.8.6.1
httpd
0:2.4.6-95.el7, 2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1, 2.4.41-1.ph1, 2.4.41-1.ph2, 2.4.41-1.ph3, 2.4.6-95.0.1.el7
httpd-devel
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1, 2.4.6-95.0.1.el7
httpd-filesystem
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1
httpd-manual
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1, 2.4.6-95.0.1.el7
httpd-tools
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1, 2.4.6-95.0.1.el7
httpd:2.4
8030020200818000036.30b713e6
httpd24
2.4.41-1.88.amzn1
httpd24-devel
2.4.41-1.88.amzn1
httpd24-httpd
0:2.4.34-18.el6, 0:2.4.34-18.el7
httpd24-manual
2.4.41-1.88.amzn1
httpd24-mod_md
1:2.0.8-1.el7
httpd24-tools
2.4.41-1.88.amzn1
jbcs-httpd24-apr
0:1.6.3-86.jbcs.el6, 0:1.6.3-86.jbcs.el7
jbcs-httpd24-brotli
0:1.0.6-21.jbcs.el6, 0:1.0.6-21.jbcs.el7
jbcs-httpd24-httpd
0:2.4.37-52.jbcs.el6, 0:2.4.37-52.jbcs.el7
jbcs-httpd24-mod_cluster-native
0:1.3.12-41.Final_redhat_2.jbcs.el6, 0:1.3.12-41.Final_redhat_2.jbcs.el7
Timeline
Publicly disclosed
Apr 21, 2021
Added to Industry KEV feed
Feb 22, 2022
Last updated
Aug 4, 2026
Weakness Type
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
References
- advisoryRHSA-2020:1336
- advisoryRHSA-2020:1337
- advisoryRHSA-2020:2263
- advisoryRHSA-2020:3958
- advisoryRHSA-2020:4751
FAQ
Common Questions.
In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL.
Affected: HTTP Server (Apache) versions >= 2.4.0 to 2.4.39; apache2 (alpine); rootio-apache2, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Feb 22, 2022.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including HTTP Server <=2.4.39, apache2 2.4.10-10+deb8u15, apache2 2.4.18-2ubuntu3.12.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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