CVE-2026-77998

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 72% 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, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

Joomla Extension - miniorange.com - Unauthenticated Authentication Bypass via SAMLResponse Parameter in miniOrange SAML SSO < 11.0.2, SAML SP Single Sign On – Login with ADFS < 6.4, SAML SP Single Sign On – SAML SSO login with Google Apps < 6.4 - This is due to the mo_saml_validate_signature() function performing a loose boolean check on the raw tri-state integer returned by PHP's openssl_verify(), causing an error return value of -1 to be evaluated as truthy and therefore treated as a successful signature verification. This makes it possible for unauthenticated attackers to log in as any existing Joomla user, including administrators, by submitting a crafted SAMLResponse containing an attacker-controlled NameID and a deliberately malformed signature value that triggers an OpenSSL processing error — bypassing verification entirely and resulting in wp_set_auth_cookie() being called for the targeted account.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 25, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

miniOrange Security Software: IAM, PAM, IGA, MDM, DLP, Data Privacy & AI Security

https://www.miniorange.com/

Vendor Advisories for CVE-2026-77998(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 54× in last 7d / 222× 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 222 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77998?
CVE-2026-77998 is a critical vulnerability published on August 25, 2026. Joomla Extension - miniorange.com - Unauthenticated Authentication Bypass via SAMLResponse Parameter in miniOrange SAML SSO < 11.0.2, SAML SP Single Sign On – Login with ADFS < 6.4, SAML SP Single Sign On – SAML SSO login with Google Apps < 6.4 - This is due to the mosamlvalidatesignature()…
When was CVE-2026-77998 disclosed?
CVE-2026-77998 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77998 actively exploited?
CVE-2026-77998 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 72.4% of all scored CVEs.
What is the CVSS score of CVE-2026-77998?
CVE-2026-77998 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-77998?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77998, 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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