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
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jun 9, 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(5)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-utils (2.4.66-2ubuntu2.4) @ resolute2026-07-26ubuntu
ubuntulibapache2-mod-proxy-html (1:2.4.7-1ubuntu4.22+esm14) @ trusty2026-07-26ubuntu
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.

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 22× in last 7d / 128× 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 239 total refreshes for this CVE.

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

Related CVEs(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 in the National Vulnerability Database 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 1% probability of exploitation in the next 30 days, which ranks it in the top 57.9% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42535, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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