CVE-2026-45267

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
Patch available. Sources: github_pr, github.
githubMentions a patch (unverified)

Missing permission check for reading form submissions · Advisory · nextcloud/security-advisories · GitHub

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4gh-f8x6-m55f
github_pr Patch Available

fix: handle submissions correctly when user wants to edit a given response

Patch available: nextcloud/forms v5.3.0-alpha.0 (PR #3269 merged 2026-04-07)

https://github.com/nextcloud/forms/pull/3269

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 22× 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 147 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-45267?
CVE-2026-45267 is a medium vulnerability published on June 1, 2026. Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.
When was CVE-2026-45267 disclosed?
CVE-2026-45267 was first published on June 1, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45267 actively exploited?
CVE-2026-45267 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45267?
CVE-2026-45267 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-45267?
A fix for CVE-2026-45267 is available: update to the fixed version the vendor names in its advisory.

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