CVE-2026-42536PoC(apache / http_server)

LOWCVSS 7.5 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Prioritize remediation for apache http_server systems immediately
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

apache CVEs Back to dashboard

3.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

Other references

Weakness type (CWE)

CWE-122CWE-120

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

http_server

Threat summary

Public PoC and exploit tooling are both present
4 mentions across 4 observed days
Momentum state: stable

What's happening

Exploit tool or code specified in 1 signal
PoC mentioned or linked in 3 signals
Technical details provided in 4 signals
Disclosure: 1 classified signal
Peaked 3d ago at 1 mentions (2026-09-13); latest day: 1
4 total mentions across 4 days

Affected systems

Vendors

apache

Products

http_server

Deep dive

Activity timeline4 mentions / 4d

Signal classification2 categories

PoC

375.0%

Disclosure

125.0%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-09-13	1	Disclosure1
2026-09-14	1	PoC1
2026-09-15	1	PoC1
2026-09-18	1	PoC1

Full discourse4 posts

Rıdvan Yağlı@ridvanyagli45d
PoC
Apache HTTP Server'da CVE-2026-42536 için mod_xml2enc kaynaklı heap-based out-of-bounds write açığına yönelik PoC yayınlandı. Apache 2.4.0–2.4.67 sürümlerini etkiliyor. https://github.com/erberkan/CVE-2026-42536-PoC
Post summary
The tweet announces a published Proof of Concept for CVE-2026-42536, a heap-based out-of-bounds write affecting Apache HTTP Server versions 2.4.0–2.4.67, and includes a link to the GitHub PoC.
020091375.0K
2.5K followersView on X
Nicolas Krassas@Dinosn45d
PoC
Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content https://github.com/erberkan/CVE-2026-42536-PoC
Post summary
Text announces a heap-based buffer overflow in Apache HTTP Server mod_xml2enc and links to a GitHub PoC repository.
110053225.2K
162.5K followersView on X
CCB Alert@CCBalert41d
PoC
Warning: Public PoC exploit for a heap-based buffer overflow vulnerability affecting Apache HTTP Server. #CVE-2026-42536 CVSS:7.5. Exploitation allows remote, unauthenticated network attackers to repeatedly crash httpd worker processes, causing #DoS! #Patch #Patch #Patch
Post summary
A public PoC exploit for CVE-2026-42536 (heap-based buffer overflow in Apache HTTP Server) is highlighted, enabling remote unauthenticated DoS. No named patch or active exploitation is mentioned.
00000429
7.3K followersView on X
cybrmonk@cybr_monk46d
Disclosure
CVE-2026-42536: Remote Code Execution Possible Now in Apache HTTP Server 2.4-67 and Earlier https://cybrmonk.com/blog/cve-2026-42536-remote-code-execution-possible-now-in-apache-http-server-2-4-67-and-earlier #cybersecurity #threatintelligence https://t.co/3abbCleSEt
Post summary
The tweet discloses CVE-2026-42536, a remote code execution flaw in Apache HTTP Server 2.4.67 and earlier, and links to a blog post for further information. No exploit, patch, or active exploitation claims are present.
0000050
47 followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	apache	http_server	-	-	-

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What researchers are saying

CVE-2026-42536

Rıdvan Yağlı[verified]@ridvanyagliPoC

The tweet announces a published Proof of Concept for CVE-2026-42536, a heap-based out-of-bounds write affecting Apache HTTP Server versions 2.4.0–2.4.67, and includes a link to the GitHub PoC.

Nicolas Krassas[verified]@DinosnPoC

Text announces a heap-based buffer overflow in Apache HTTP Server mod_xml2enc and links to a GitHub PoC repository.

CCB Alert@CCBalertPoC

A public PoC exploit for CVE-2026-42536 (heap-based buffer overflow in Apache HTTP Server) is highlighted, enabling remote unauthenticated DoS. No named patch or active exploitation is mentioned.

cybrmonk@cybr_monkDisclosure

The tweet discloses CVE-2026-42536, a remote code execution flaw in Apache HTTP Server 2.4.67 and earlier, and links to a blog post for further information. No exploit, patch, or active exploitation claims are present.