CVE-2026-39918

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 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)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

April 20, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Sep 1, 2026
Patch available. Sources: github_release, github_commit.
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_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
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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 84× 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 243 total refreshes for this CVE.

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

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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 28, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 50.7% of all scored CVEs.
What is the CVSS score of CVE-2026-39918?
CVE-2026-39918 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
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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