CVE-2026-54540

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 47% 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
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Pheditor is a single-file editor and file manager written in PHP. Prior to version 2.0.5, there is an authenticated terminal command whitelist bypass. The terminal feature checks whether the submitted command starts with one of the configured TERMINAL_COMMANDS values, then passes the full command string to shell_exec(). Shell command substitution such as $() is not blocked, so an authenticated user with the terminal permission can bypass a restricted command allowlist and execute arbitrary shell commands as the web server user. This issue has been patched in version 2.0.5.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100

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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.7%
EPSS %ILE
52nd
KEV
Not listed

Published

July 16, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Jul 27, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

Authenticated terminal command whitelist bypass in Pheditor · Advisory · pheditor/pheditor · GitHub

https://github.com/pheditor/pheditor/security/advisories/GHSA-9643-6xjp-vx57
github_release Patch Available

Pheditor 2.0.5

Patch available: pheditor/pheditor 2.0.5

https://github.com/pheditor/pheditor/releases/tag/2.0.5

Vendor Advisories for CVE-2026-54540(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
pheditor/pheditor2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.42.0.5—

Weakness Classification(1)

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

Data Freshness Timeline

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

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Frequently asked(5)

What is CVE-2026-54540?
CVE-2026-54540 is a high vulnerability published on July 16, 2026. Pheditor is a single-file editor and file manager written in PHP. Prior to version 2.0.5, there is an authenticated terminal command whitelist bypass. The terminal feature checks whether the submitted command starts with one of the configured TERMINALCOMMANDS values, then passes the full command…
When was CVE-2026-54540 disclosed?
CVE-2026-54540 was first published on July 16, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54540 actively exploited?
CVE-2026-54540 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54540?
CVE-2026-54540 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54540?
A fix for CVE-2026-54540 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54540 are linked in the Vendor Advisories panel on this page.

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