How severe is CVE-2026-42535?

CVE-2026-42535 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-42535 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42535?

CVE-2026-42535 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42535?

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

Does CVE-2026-42535 have an EU (EUVD) identifier?

Yes. CVE-2026-42535 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35090.

When was CVE-2026-42535 published?

CVE-2026-42535 was published on 2026-06-08 and last updated on 2026-06-17.

CVE-2026-42535

CVE-2026-42535 is a critical-severity vulnerability in Apache Http Server with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-668.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35090
Weakness: CWE-668
Affected product: Apache Http Server
Published: 2026-06-08
Last modified: 2026-06-17

Description

A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. Users are recommended to upgrade to version 2.4.68, which fixes this issue.

Frequently asked questions

What is CVE-2026-42535?: A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes. Users are recommended to upgrade to version 2.4.68, which fixes this issue.
How severe is CVE-2026-42535?: CVE-2026-42535 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-42535 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42535?: CVE-2026-42535 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42535?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-42535 have an EU (EUVD) identifier?: Yes. CVE-2026-42535 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35090.
When was CVE-2026-42535 published?: CVE-2026-42535 was published on 2026-06-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

50.255.62.89 (ipv4-addr)
147.15.15.226 (ipv4-addr)
45.84.120.3 (ipv4-addr)
79.137.34.248 (ipv4-addr)
77.90.185.88 (ipv4-addr)
77.90.185.87 (ipv4-addr)
74.87.117.150 (ipv4-addr)
50.35.168.148 (ipv4-addr)