CVE-2026-42535

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.7%
EPSS %ILE
51st
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

oss-security - CVE-2026-42535: Apache HTTP Server: mod_dav_fs protected directory access

http://www.openwall.com/lists/oss-security/2026/06/08/8
generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

https://httpd.apache.org/security/vulnerabilities_24.html

Vendor Advisories for CVE-2026-42535(8)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuapache2-utils (2.4.18-2ubuntu3.17+esm19) @ xenial2026-09-14ubuntu
ubuntuapache2-utils (2.4.66-2ubuntu2.4) @ resolute2026-09-14ubuntu
redhatjbcs-httpd24-mod_security-0:2.9.6-19.el8jbcs2026-08-19redhat
redhatjbcs-httpd24-httpd2026-08-19redhat
redhatinsights-proxy/insights-proxy-container-rhel9:17864336562026-08-11redhat
redhathttpd-0:2.4.62-13.el9_8.52026-07-20redhat
redhathttpd-0:2.4.63-13.el10_2.42026-07-01redhat
redhathttpd-main-2.4.68-1.hum12026-06-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.68-r0: fixed in 2.4.68-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.68-r0: fixed in 2.4.68-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.68-r0: fixed in 2.4.68-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
apache2—
  • every version up to 2.4.68-r0: fixed in 2.4.68-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.48-3.1 ... 2.4.67-1~deb11u2 (84 versions)
  • every version up to 2.4.67-1~deb11u3: fixed in 2.4.67-1~deb11u3
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.57-2 ... 2.4.67-2 (53 versions)
  • every version up to 2.4.68-1~deb12u1: fixed in 2.4.68-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.65-2 ... 2.4.68-1~deb12u1 (27 versions)
  • every version up to 2.4.68-1~deb13u1: fixed in 2.4.68-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
apache22.4.65-2 ... 2.4.68-1~deb13u1 (28 versions)
  • every version up to 2.4.68-1: fixed in 2.4.68-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 4× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 541 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 14:25 UTCEPSS rescore
  3. 2026-10-01 19:50 UTCEPSS rescore
  4. 2026-09-30 15:03 UTCEPSS rescore
  5. 2026-09-27 13:48 UTCEPSS rescore
  6. 2026-09-26 15:58 UTCEPSS rescore
  7. 2026-09-23 17:53 UTCEPSS rescore
  8. 2026-09-20 20:15 UTCEPSS rescore
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-17 19:31 UTCEPSS rescore
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-14 08:52 UTCVendor advisory
  14. 2026-09-14 08:52 UTCGHSA enrichment
  15. 2026-09-14 04:53 UTCEG score recompute
  16. 2026-09-14 04:53 UTCVendor advisory
  17. 2026-09-14 04:53 UTCGHSA enrichment
  18. 2026-09-13 16:47 UTCEPSS rescore
  19. 2026-09-12 15:01 UTCEPSS rescore
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 09:37 UTCEPSS rescore
  22. 2026-09-10 09:34 UTCEPSS rescore
  23. 2026-09-08 22:00 UTCEPSS rescore
  24. 2026-09-07 16:01 UTCEPSS rescore
  25. 2026-09-06 13:47 UTCEPSS rescore
Show 75 more
  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-08-31 02:09 UTCEG score recompute
  5. 2026-08-31 02:09 UTCVendor advisory
  6. 2026-08-31 02:09 UTCGHSA enrichment
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-28 21:41 UTCEPSS rescore
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-25 05:26 UTCVendor advisory
  14. 2026-08-25 05:26 UTCGHSA enrichment
  15. 2026-08-25 01:33 UTCEG score recompute
  16. 2026-08-25 01:33 UTCVendor advisory
  17. 2026-08-25 01:33 UTCGHSA enrichment
  18. 2026-08-23 23:47 UTCVendor advisory
  19. 2026-08-23 23:47 UTCGHSA enrichment
  20. 2026-08-23 19:37 UTCVendor advisory
  21. 2026-08-23 19:37 UTCGHSA enrichment
  22. 2026-08-23 15:45 UTCVendor advisory
  23. 2026-08-23 15:45 UTCGHSA enrichment
  24. 2026-08-23 11:52 UTCEG score recompute
  25. 2026-08-23 11:52 UTCVendor advisory
  26. 2026-08-23 11:52 UTCGHSA enrichment
  27. 2026-08-23 00:19 UTCEPSS rescore
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-21 23:48 UTCVendor advisory
  30. 2026-08-21 23:48 UTCGHSA enrichment
  31. 2026-08-21 19:55 UTCVendor advisory
  32. 2026-08-21 19:55 UTCGHSA enrichment
  33. 2026-08-21 12:43 UTCVendor advisory
  34. 2026-08-21 12:43 UTCGHSA enrichment
  35. 2026-08-21 06:42 UTCVendor advisory
  36. 2026-08-21 06:42 UTCGHSA enrichment
  37. 2026-08-21 01:11 UTCEG score recompute
  38. 2026-08-21 01:11 UTCVendor advisory
  39. 2026-08-21 01:10 UTCGHSA enrichment
  40. 2026-08-20 22:55 UTCEPSS rescore
  41. 2026-08-20 21:18 UTCVendor advisory
  42. 2026-08-20 21:18 UTCGHSA enrichment
  43. 2026-08-20 17:26 UTCVendor advisory
  44. 2026-08-20 17:26 UTCGHSA enrichment
  45. 2026-08-20 09:32 UTCEG score recompute
  46. 2026-08-20 09:32 UTCVendor advisory
  47. 2026-08-20 09:32 UTCGHSA enrichment
  48. 2026-08-19 17:03 UTCEPSS rescore
  49. 2026-08-18 13:48 UTCEPSS rescore
  50. 2026-08-17 14:32 UTCEG score recompute
  51. 2026-08-17 14:32 UTCVendor advisory
  52. 2026-08-17 14:32 UTCGHSA enrichment
  53. 2026-08-17 13:47 UTCEPSS rescore
  54. 2026-08-17 10:32 UTCVendor advisory
  55. 2026-08-17 10:32 UTCGHSA enrichment
  56. 2026-08-17 06:40 UTCVendor advisory
  57. 2026-08-17 06:40 UTCGHSA enrichment
  58. 2026-08-17 01:58 UTCVendor advisory
  59. 2026-08-17 01:58 UTCGHSA enrichment
  60. 2026-08-16 16:54 UTCEG score recompute
  61. 2026-08-16 16:54 UTCVendor advisory
  62. 2026-08-16 16:54 UTCGHSA enrichment
  63. 2026-08-16 14:56 UTCEPSS rescore
  64. 2026-08-16 13:01 UTCVendor advisory
  65. 2026-08-16 13:01 UTCGHSA enrichment
  66. 2026-08-16 09:09 UTCVendor advisory
  67. 2026-08-16 09:09 UTCGHSA enrichment
  68. 2026-08-16 05:10 UTCEG score recompute
  69. 2026-08-16 05:10 UTCVendor advisory
  70. 2026-08-16 05:10 UTCGHSA enrichment
  71. 2026-08-16 02:14 UTCEPSS rescore
  72. 2026-08-16 01:17 UTCVendor advisory
  73. 2026-08-16 01:17 UTCGHSA enrichment
  74. 2026-08-15 15:55 UTCVendor advisory
  75. 2026-08-15 15:55 UTCGHSA enrichment

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42535?
CVE-2026-42535 is a critical vulnerability published on June 8, 2026. A path handling issue in moddavfs 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.
When was CVE-2026-42535 disclosed?
CVE-2026-42535 was first published on June 8, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42535 actively exploited?
CVE-2026-42535 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42535?
CVE-2026-42535 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-42535?
A fix for CVE-2026-42535 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42535 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-42535

Explore →

Is Your Infrastructure Affected by CVE-2026-42535?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs