CVE-2026-77139

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). 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, secondary
Trending — 3 sources updated this week
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.0Exploit: None knownExposed: 0

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

The extension fails to validate a client-supplied template element key before using it to build file paths for saving and deleting Mask template files. An authenticated backend user with access to the Mask module can supply a key containing path traversal sequences to create or delete .html files outside the configured template directory.

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity60% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
No patch confirmed yet.
generic

TYPO3-EXT-SA-2026-017: Path Traversal in extension "Mask" (mask) - TYPO3 News

https://typo3.org/security/advisory/typo3-ext-sa-2026-017

Vendor Advisories for CVE-2026-77139(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 77× 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.

  1. 2026-09-19 20:55 UTCEG score recompute
  2. 2026-09-19 20:55 UTCGHSA enrichment
  3. 2026-09-18 21:34 UTCEG score recompute
  4. 2026-09-18 21:34 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 21:09 UTCEG score recompute
  7. 2026-09-17 21:09 UTCGHSA enrichment
  8. 2026-09-16 21:34 UTCEG score recompute
  9. 2026-09-16 21:34 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 21:02 UTCEG score recompute
  13. 2026-09-15 21:02 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 21:35 UTCGHSA enrichment
  16. 2026-09-13 22:09 UTCEG score recompute
  17. 2026-09-13 22:09 UTCGHSA enrichment
  18. 2026-09-12 22:51 UTCEG score recompute
  19. 2026-09-12 22:51 UTCGHSA enrichment
  20. 2026-09-12 15:02 UTCEPSS rescore
  21. 2026-09-11 23:32 UTCEG score recompute
  22. 2026-09-11 23:32 UTCGHSA enrichment
  23. 2026-09-11 00:13 UTCEG score recompute
  24. 2026-09-11 00:13 UTCGHSA enrichment
  25. 2026-09-10 09:35 UTCEPSS rescore
Show 52 more
  1. 2026-09-10 00:38 UTCGHSA enrichment
  2. 2026-09-09 01:17 UTCEG score recompute
  3. 2026-09-09 01:17 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-07 09:34 UTCEG score recompute
  6. 2026-09-07 09:34 UTCGHSA enrichment
  7. 2026-09-06 13:48 UTCEPSS rescore
  8. 2026-09-06 10:14 UTCEG score recompute
  9. 2026-09-06 10:14 UTCGHSA enrichment
  10. 2026-09-05 10:48 UTCEG score recompute
  11. 2026-09-05 10:48 UTCGHSA enrichment
  12. 2026-09-04 11:30 UTCEG score recompute
  13. 2026-09-04 11:30 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-03 12:11 UTCEG score recompute
  16. 2026-09-03 12:11 UTCGHSA enrichment
  17. 2026-09-02 14:12 UTCEPSS rescore
  18. 2026-09-02 12:53 UTCEG score recompute
  19. 2026-09-02 12:53 UTCGHSA enrichment
  20. 2026-09-01 13:54 UTCEPSS rescore
  21. 2026-09-01 13:25 UTCEG score recompute
  22. 2026-09-01 13:25 UTCGHSA enrichment
  23. 2026-09-01 04:40 UTCEPSS rescore
  24. 2026-09-01 04:40 UTCEPSS rescore
  25. 2026-08-31 14:07 UTCEG score recompute
  26. 2026-08-31 14:07 UTCGHSA enrichment
  27. 2026-08-30 19:18 UTCEPSS rescore
  28. 2026-08-30 19:17 UTCEPSS rescore
  29. 2026-08-30 14:48 UTCEG score recompute
  30. 2026-08-30 14:48 UTCGHSA enrichment
  31. 2026-08-30 01:22 UTCEPSS rescore
  32. 2026-08-29 15:30 UTCEG score recompute
  33. 2026-08-29 15:30 UTCGHSA enrichment
  34. 2026-08-28 21:42 UTCEPSS rescore
  35. 2026-08-28 16:11 UTCGHSA enrichment
  36. 2026-08-27 16:44 UTCEG score recompute
  37. 2026-08-27 16:43 UTCGHSA enrichment
  38. 2026-08-27 14:25 UTCEPSS rescore
  39. 2026-08-26 17:23 UTCEG score recompute
  40. 2026-08-26 17:23 UTCGHSA enrichment
  41. 2026-08-26 14:47 UTCEPSS rescore
  42. 2026-08-26 13:39 UTCGHSA enrichment
  43. 2026-08-25 14:21 UTCEG score recompute
  44. 2026-08-25 14:21 UTCGHSA enrichment
  45. 2026-08-25 14:15 UTCEG score recompute
  46. 2026-08-25 14:15 UTCGHSA enrichment
  47. 2026-08-25 13:49 UTCEPSS rescore
  48. 2026-08-25 12:33 UTCEG score recompute
  49. 2026-08-25 12:33 UTCGHSA enrichment
  50. 2026-08-25 09:22 UTCEG score recompute
  51. 2026-08-25 09:07 UTCEG score recompute
  52. 2026-08-25 09:06 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-77139?
CVE-2026-77139 is a medium vulnerability published on August 25, 2026. The extension fails to validate a client-supplied template element key before using it to build file paths for saving and deleting Mask template files. An authenticated backend user with access to the Mask module can supply a key containing path traversal sequences to create or delete .html files…
When was CVE-2026-77139 disclosed?
CVE-2026-77139 was first published in the National Vulnerability Database 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-2026-77139 actively exploited?
CVE-2026-77139 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 78.0% of all scored CVEs.
What is the CVSS score of CVE-2026-77139?
CVE-2026-77139 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-77139?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77139, 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

Explore the affected products and dependency analysis for CVE-2026-77139

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