CVE-2026-39918

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-20. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Vvveb prior to 1.0.8.1 contains a code injection vulnerability in the installation endpoint where the subdir POST parameter is written unsanitized into the env.php configuration file without escaping or validation. Attackers can inject arbitrary PHP code by breaking out of the string context in the define statement to achieve unauthenticated remote code execution as the web server user.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
47.6%
KEV
Not listed

Published

April 20, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jul 16, 2026
Patch available. Sources: github_commit, github_release.
generic

Vvveb < 1.0.8.1 Code Injection via Installation Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vvveb-code-injection-via-installation-endpoint
github_release Patch Available

Vvveb 1.0.8.1

Patch available: givanz/Vvveb 1.0.8.1

https://github.com/givanz/Vvveb/releases/tag/1.0.8.1
github_commit Patch Available

commit 5162c1639130 (givanz/Vvveb)

Patch available: givanz/Vvveb 1.0.8.1 (contains commit 5162c1639130)

https://github.com/givanz/Vvveb/commit/5162c1639130bd080ab63c7d856788cd59d6b3b7

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 37× 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 183 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-39918?
CVE-2026-39918 is a critical vulnerability published on April 20, 2026. Vvveb prior to 1.0.8.1 contains a code injection vulnerability in the installation endpoint where the subdir POST parameter is written unsanitized into the env.php configuration file without escaping or validation. Attackers can inject arbitrary PHP code by breaking out of the string context in the…
When was CVE-2026-39918 disclosed?
CVE-2026-39918 was first published in the National Vulnerability Database on April 20, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39918 actively exploited?
CVE-2026-39918 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39918?
CVE-2026-39918 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-39918?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39918, 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.

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