How severe is CVE-2026-49975?

CVE-2026-49975 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-49975 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49975?

CVE-2026-49975 primarily affects Apache Http Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-49975?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-49975 have an EU (EUVD) identifier?

Yes. CVE-2026-49975 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35105.

When was CVE-2026-49975 published?

CVE-2026-49975 was published on 2026-06-08 and last updated on 2026-07-08.

CVE-2026-49975

CVE-2026-49975 is a high-severity vulnerability in Apache Http Server with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-789.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35105
Weakness: CWE-789
Affected product: Apache Http Server
Published: 2026-06-08
Last modified: 2026-07-08

Description

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

Frequently asked questions

What is CVE-2026-49975?: Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
How severe is CVE-2026-49975?: CVE-2026-49975 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-49975 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49975?: CVE-2026-49975 primarily affects Apache Http Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-49975?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-49975 have an EU (EUVD) identifier?: Yes. CVE-2026-49975 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35105.
When was CVE-2026-49975 published?: CVE-2026-49975 was published on 2026-06-08 and last updated on 2026-07-08.

References

Affected products (2)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

More vulnerabilities in Apache Http Server

CVE-2010-0425 — Critical (CVSS 10.0): modules/arch/win32/mod_isapi.c in mod_isapi in the Apache HTTP Server 2.0.37 through 2.0.63, 2.2.0 through 2.2.14, and…
CVE-2005-2700 — Critical (CVSS 10.0): ssl_engine_kernel.c in mod_ssl before 2.8.24, when using "SSLVerifyClient optional" in the global virtual host…
CVE-2004-0492 — Critical (CVSS 10.0): Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a…
CVE-2003-0789 — Critical (CVSS 10.0): mod_cgid in Apache before 2.0.48, when using a threaded MPM, does not properly handle CGI redirect paths, which could…
CVE-1999-1293 — Critical (CVSS 10.0): mod_proxy in Apache 1.2.5 and earlier allows remote attackers to cause a denial of service via malformed FTP commands,…
CVE-1999-0926 — Critical (CVSS 10.0): Apache allows remote attackers to conduct a denial of service via a large number of MIME headers.

All CVEs affecting Apache Http Server →

Other CWE-789 vulnerabilities

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CVE-2021-34868 — High (CVSS 8.8): This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop…
CVE-2024-20260 — High (CVSS 8.6): A vulnerability in the VPN and management web servers of the Cisco Adaptive Security Virtual Appliance (ASAv) and Cisco…
CVE-2021-34867 — High (CVSS 8.2): This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop…
CVE-2026-20048 — High (CVSS 7.7): A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches…
CVE-2026-15053 — High (CVSS 7.5): Tanium addressed a denial of service vulnerability in Tanium Server.

Browse all CWE-789 vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

2.26.49.39 (ipv4-addr)
62.210.142.61 (ipv4-addr)
196.188.93.169 (ipv4-addr)
181.143.162.230 (ipv4-addr)
43.172.74.146 (ipv4-addr)
134.209.202.49 (ipv4-addr)
180.93.138.150 (ipv4-addr)
62.210.142.168 (ipv4-addr)