CVE-2026-77129

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (31st percentile of EPSS-scored CVEs). 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
7.7EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.7Exploit: None knownExposed services: Not assessed

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

The extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects. Exploitation of this issue requires an authenticated backend account with edit access to the event registration plugin or backend module.

CVSS v3
7.7
EG Score
7.7HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 25, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
No fix on record yet.
generic

TYPO3-EXT-SA-2026-023: Multiple vulnerabilities in extension "Event management and registration" (sf_event_mgt) - TYPO3 News

https://typo3.org/security/advisory/typo3-ext-sa-2026-023

Vendor Advisories for CVE-2026-77129(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 21× in last 7d / 102× 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 169 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-77129?
CVE-2026-77129 is a high vulnerability published on August 25, 2026. The extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content…
When was CVE-2026-77129 disclosed?
CVE-2026-77129 was first published on August 25, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77129 actively exploited?
CVE-2026-77129 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77129?
CVE-2026-77129 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77129?
No fix for CVE-2026-77129 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-77129 are linked in the Vendor Advisories panel on this page.

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