NVD / CVE Program· CNA apache

CVE-2019-0211: In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or

Noroxi assessment

Priority: Now (action score 81/100)

CISA has confirmed exploitation in the wild (Nov 3, 2021). Remediation deadline for US federal agencies: May 3, 2022.
Probability of exploitation in the next 30 days: 65% (FIRST EPSS); higher than 99.2% of all records.
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: apache2 (Alpine:v3.10) 2.4.39-r0; apache2 (Debian:12) 2.4.38-3; apache2 (Debian:9) 2.4.25-3+deb9u7.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Upgrade to apache2 (Alpine:v3.10) 2.4.39-r0; apache2 (Debian:12) 2.4.38-3; apache2 (Debian:9) 2.4.25-3+deb9u7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.

HighCVSS 7.8 · v3.1KEVWeaponized Fix available

Published: Apr 8, 2019
Updated: Jun 16, 2026
EPSS: 65.0% · 99th percentile
CWE: CWE-416

Report tools

JSON

Action score

Now

Patch today or shut off access.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 20 / 30 · 65.0%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 3, 2021. That signals real attacks, not theory.

Remediation deadline for US federal agencies: May 3, 2022.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
apache	http server	cpe:2.3:a:apache:http_server
debian	debian linux	cpe:2.3:o:debian:debian_linux
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
opensuse	leap	cpe:2.3:o:opensuse:leap
netapp	oncommand unified manager	cpe:2.3:a:netapp:oncommand_unified_manager
redhat	jboss core services	cpe:2.3:a:redhat:jboss_core_services
redhat	openshift container platform	cpe:2.3:a:redhat:openshift_container_platform
redhat	openshift container platform for power	cpe:2.3:a:redhat:openshift_container_platform_for_power
redhat	software collections	cpe:2.3:a:redhat:software_collections
redhat	enterprise linux	cpe:2.3:o:redhat:enterprise_linux
redhat	enterprise linux eus	cpe:2.3:o:redhat:enterprise_linux_eus

and 15 more

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

apache http server2.4.17 and later · up to 2.4.38 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

Apache Apache HTTP Server
- 2.4.17 to 2.4.38affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

+56

Same product

apache: all records

Other highest-scoring records for the same primary product.

CVE-2021-42013Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)KEV
99Now
CVE-2021-41773Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49KEV
99Now
CVE-2024-38475Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.KEV
96Now

Published before and after this one in the same product

← EarlierCVE-2019-0215Apr 8, 2019 · In Apache HTTP Server 2.4 releases 2.4.37 and 2.4.38, a bug in mod_ssl when using per-location client certificate verification with TLSv1.3
33Monitor
← EarlierCVE-2019-0217Apr 8, 2019 · In Apache HTTP Server 2.4 release 2.4.38 and prior, a race condition in mod_auth_digest when running in a threaded server could allow a user
35Monitor
Later →CVE-2019-0220Jun 11, 2019 · A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38.
26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:apache2	2.4.39-r0 · Alpine:v3.10	Package registry (OSV)
debian:apache2	2.4.38-3 · Debian:12	Package registry (OSV)
opensuse:apache2	2.4.33-lp150.2.17.1 · openSUSE:Leap 15.0	Package registry (OSV)
red hat:httpd24-httpd	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-httpd-debuginfo	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-httpd-devel	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-httpd-manual	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-httpd-tools	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-mod_auth_mellon	0:0.13.1-2.el7.1 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_auth_mellon-debuginfo	0:0.13.1-2.el7.1 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_ldap	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-mod_md	0:2.4.34-7.el7.1 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_proxy_html	1:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-mod_session	0:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
red hat:httpd24-mod_ssl	1:2.4.34-7.el6.1 · Red Hat:rhel_software_collections:3::el6	Package registry (OSV)
suse:apache2	2.4.33-3.15.1 · SUSE:Linux Enterprise Module for Server Applications 15	Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Exploit-DB entry ×1
Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Exploit-DB entry	local	2019-04-08
Proof-of-concept repository on GitHub	stars:11	2019-05-12
Proof-of-concept repository on GitHub	stars:0	2026-05-31

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCApr 8, 2019-1 d
PublishedApr 8, 2019
CISA KEVNov 3, 2021+939 d
TodayOct 25, 2026+2757 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-19-034 · Apr 7, 2019(Apache HTTP Sunucu için Güvenlik Güncellemeleri Yayınladı)

All national notices →

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.opensuse.org/opensuse-security-announce/2019-04/msg00051.html

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

What does it mean in your environment?

We use this product, ask for help

Data sources and verification

CNA: apache

CVE.org (CNA)Oct 21, 2025, 11:45 PM UTC
CISA ADPOct 21, 2025, 11:45 PM UTC
NVDJun 16, 2026, 10:07 PM UTC
FIRST EPSSOct 23, 2026, 12:00 AM UTC
OSV / GHSAOct 25, 2026, 3:18 AM UTC
Exploit-DBOct 25, 2026, 3:18 AM UTC
PoC-in-GitHubOct 25, 2026, 3:18 AM UTC

Each line is when that source was last processed for this record.

CVE-2019-0211: In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or

Noroxi assessment

Get told when this record changes

Follow CVE-2019-0211

What does it mean in your environment?

Affected systems

Is your version affected?

Watch new CVEs for http server

Affected versions

Versions reported by the vendor

Package-level exposure

Same product

Remediation

Which version to upgrade to

Exploit status

Research context

Timeline

Patch and commit links

Credits

Variant candidates

Chain candidates

National notice (Türkiye Cybersecurity Directorate / USOM)

Technical details

Attack conditions

If successful

Root cause

The bug in code

Attack context

Change log

References

Ecosystem	Package	Affected range	Fix
Alpine:v3.10	apache2	before 2.4.39-r0	2.4.39-r0
Debian:12	apache2	before 2.4.38-3	2.4.38-3
Debian:9	apache2	before 2.4.25-3+deb9u7	2.4.25-3+deb9u7
openSUSE:Leap 15.0	apache2	before 2.4.33-lp150.2.17.1	2.4.33-lp150.2.17.1
Red Hat:enterprise_linux:8::appstream	httpd	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-debuginfo	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-debugsource	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-devel	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-filesystem	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-manual	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-tools	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	httpd-tools-debuginfo	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_http2	before 0:1.11.3-2.module+el8.0.0+2969+90015743	0:1.11.3-2.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_http2-debuginfo	before 0:1.11.3-2.module+el8.0.0+2969+90015743	0:1.11.3-2.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_http2-debugsource	before 0:1.11.3-2.module+el8.0.0+2969+90015743	0:1.11.3-2.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_ldap	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_ldap-debuginfo	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_md	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_md-debuginfo	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_proxy_html	before 1:2.4.37-11.module+el8.0.0+2969+90015743	1:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_proxy_html-debuginfo	before 1:2.4.37-11.module+el8.0.0+2969+90015743	1:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_session	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_session-debuginfo	before 0:2.4.37-11.module+el8.0.0+2969+90015743	0:2.4.37-11.module+el8.0.0+2969+90015743
Red Hat:enterprise_linux:8::appstream	mod_ssl	before 1:2.4.37-11.module+el8.0.0+2969+90015743	1:2.4.37-11.module+el8.0.0+2969+90015743