CVE-2026-55742

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-18. a secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cot_auth_add_group) without calling cot_check_xg to validate the anti-CSRF token.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

June 18, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Sep 6, 2026
No patch confirmed yet.
generic

Cotonti/system/admin/admin.rights.php at f43f1fc38ba4e02027786dad9dac1435c7c52b30 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.rights.php#L53
generic

GitHub - Cotonti/Cotonti: Fast, reliable and flexible PHP CMF/CMS · GitHub

https://github.com/Cotonti/Cotonti

Vendor Advisories for CVE-2026-55742(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composercotonti/cotonti—ghsa

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

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
cotonti/cotonti0.9.23 ... 1.0.0 (6 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 87× 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 444 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-55742?
CVE-2026-55742 is a critical vulnerability published on June 18, 2026. Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cotauthaddgroup) without calling cotcheck_xg to…
When was CVE-2026-55742 disclosed?
CVE-2026-55742 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55742 actively exploited?
CVE-2026-55742 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.4% of all scored CVEs.
What is the CVSS score of CVE-2026-55742?
CVE-2026-55742 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-55742?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55742, 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.

Dependency Blast Radius

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