CVE-2019-0196· NVD / CVE Program· CNA apache

A vulnerability was found in Apache HTTP Server 2.4.17 to 2.4.38.

Noroxi assessment

Priority: Monitor (action score 27/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 19.9% (FIRST EPSS); higher than 97.4% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: mod_md (AlmaLinux:8) 1:2.0.8-8.module_el8.5.0+2609+b30d9eec, 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa; apache2 (Alpine:v3.10) 2.4.39-r0; apache2 (Debian:12) 2.4.38-3.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to mod_md (AlmaLinux:8) 1:2.0.8-8.module_el8.5.0+2609+b30d9eec, 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa; apache2 (Alpine:v3.10) 2.4.39-r0; apache2 (Debian:12) 2.4.38-3 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 · FIRST EPSS

A vulnerability was found in Apache HTTP Server 2.4.17 to 2.4.38. Using fuzzed network input, the http/2 request handling could be made to access freed memory in string comparison when determining the method of a request and thus process the request incorrectly.

MediumCVSS 5.3 · v3.0—No exploit Fix available

Published: Jun 11, 2019
Updated: Jun 16, 2026
EPSS: 19.9% · 97th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 21 / 40 · 5.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 6 / 30 · 19.9%

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No public exploit code on record
A fix has been released

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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
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
debian	debian linux	cpe:2.3:o:debian:debian_linux

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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 Software Foundation 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.

+96

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-2019-0211Apr 8, 2019 · 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 orKEV
81Now
← EarlierCVE-2019-0220Jun 11, 2019 · A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38.
26Monitor
Later →CVE-2019-0197Jun 11, 2019 · A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38.
19Monitor

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
almalinux:mod_md	1:2.0.8-8.module_el8.5.0+2609+b30d9eec · AlmaLinux:8	Package registry (OSV)
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:jbcs-httpd24-apr	0:1.6.3-63.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-debuginfo	0:1.6.3-63.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-devel	0:1.6.3-63.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-debuginfo	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-devel	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-ldap	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-mysql	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-nss	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-odbc	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-openssl	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-util-pgsql	0:1.6.1-48.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
rocky linux:mod_md	1:2.0.8-8.module+el8.5.0+695+1fa8055e · Rocky Linux:8	Package registry (OSV)
suse:apache2	2.4.33-3.15.1 · SUSE:Linux Enterprise Module for Server Applications 15	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days-1% in 7 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

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: low · the service can be disrupted

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

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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, 10:47 PM UTC

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

References

www.oracle.com/security-alerts/cpuapr2020.html

Show all references (19 more)

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

All records