CVE-2026-40500

✕ Withdrawn — historical dataMEDIUMPre-NVD 6.8Elevated
6.8CVSS
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: Elevated riskExposed: 0

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

ProcessWire CMS version 3.0.255 and prior contain a server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature that allows authenticated administrators to supply arbitrary URLs to the module download parameter, causing the server to issue outbound HTTP requests to attacker-controlled internal or external hosts. Attackers can exploit differentiable error messages returned by the server to perform reliable internal network port scanning, host enumeration across RFC-1918 ranges, and potential access to cloud instance metadata endpoints.

CVSS v3
6.8
EG Score
0.0(none)
EG Risk
0
EG Risk 0/100

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. It is distinct from the 0–10 EG Score, which measures severity.

EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

April 15, 2026

Last Modified

July 7, 2026

Advisory Details (3)

Auto-updated May 1, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

ProcessWire CMS SSRF via Add Module From URL | Advisories | VulnCheck

https://www.vulncheck.com/advisories/processwire-cms-ssrf-via-add-module-from-url
generic

ProcessWire: An open source CMS with a powerful API

https://processwire.com/
generic🟡 PoC Available

CVE-2026-40500_SSRF Vulnerability in ProcessWire CMS.md · GitHub

https://gist.github.com/thepiyushkumarshukla/7514e5eed526fd9d20fcfc42ce8d0a82

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composerprocesswire/processwire—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
processwire/processwire3.0.123 ... 3.0.98 (22 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 1× in last 7d / 14× 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. 2026-07-23 03:11 UTCEG score recompute▼ 6.80
  2. 2026-07-20 09:32 UTCOSV refresh
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-08 15:15 UTCEPSS rescore
  5. 2026-07-07 13:46 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-01 15:06 UTCEPSS rescore
  12. 2026-06-30 23:22 UTCEPSS rescore
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 03:08 UTCEPSS rescore
  16. 2026-06-25 13:49 UTCEPSS rescore
  17. 2026-06-25 13:49 UTCEPSS rescore
  18. 2026-06-24 14:05 UTCEPSS rescore
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 14:56 UTCEPSS rescore
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-19 19:25 UTCEPSS rescore
Show 56 more
  1. 2026-06-18 17:52 UTCEPSS rescore
  2. 2026-06-18 17:52 UTCEPSS rescore
  3. 2026-06-17 17:53 UTCEPSS rescore
  4. 2026-06-16 17:52 UTCEPSS rescore
  5. 2026-06-15 17:49 UTCEPSS rescore
  6. 2026-06-14 20:40 UTCGHSA enrichment
  7. 2026-06-12 23:12 UTCEPSS rescore
  8. 2026-06-12 23:12 UTCEPSS rescore
  9. 2026-06-11 18:58 UTCGHSA enrichment
  10. 2026-06-11 14:00 UTCEPSS rescore
  11. 2026-06-10 13:22 UTCEPSS rescore
  12. 2026-06-10 13:22 UTCEPSS rescore
  13. 2026-06-10 08:44 UTCGHSA enrichment
  14. 2026-06-09 10:10 UTCGHSA enrichment
  15. 2026-06-08 14:17 UTCEPSS rescore
  16. 2026-06-08 14:17 UTCEPSS rescore
  17. 2026-06-08 03:39 UTCGHSA enrichment
  18. 2026-06-07 15:25 UTCEPSS rescore
  19. 2026-06-07 15:25 UTCEPSS rescore
  20. 2026-06-07 05:05 UTCGHSA enrichment
  21. 2026-06-06 13:47 UTCEPSS rescore
  22. 2026-06-06 13:47 UTCEPSS rescore
  23. 2026-06-05 22:47 UTCEPSS rescore
  24. 2026-06-05 06:10 UTCEPSS rescore
  25. 2026-06-05 06:10 UTCEPSS rescore
  26. 2026-06-04 13:12 UTCEPSS rescore
  27. 2026-06-04 13:12 UTCEPSS rescore
  28. 2026-06-03 18:52 UTCGHSA enrichment
  29. 2026-06-02 20:13 UTCEPSS rescore
  30. 2026-06-02 17:10 UTCGHSA enrichment
  31. 2026-06-01 18:28 UTCGHSA enrichment
  32. 2026-06-01 13:52 UTCEPSS rescore
  33. 2026-06-01 13:52 UTCEPSS rescore
  34. 2026-06-01 13:51 UTCEPSS rescore
  35. 2026-05-31 22:30 UTCEPSS rescore
  36. 2026-05-31 22:30 UTCEPSS rescore
  37. 2026-05-31 00:16 UTCEPSS rescore
  38. 2026-05-31 00:16 UTCEPSS rescore
  39. 2026-05-31 00:16 UTCEPSS rescore
  40. 2026-05-29 13:44 UTCEPSS rescore
  41. 2026-05-29 13:44 UTCEPSS rescore
  42. 2026-05-28 13:44 UTCEPSS rescore
  43. 2026-05-28 13:44 UTCEPSS rescore
  44. 2026-05-28 13:44 UTCEPSS rescore
  45. 2026-05-27 13:40 UTCEPSS rescore
  46. 2026-05-27 13:40 UTCEPSS rescore
  47. 2026-05-27 13:40 UTCEPSS rescore
  48. 2026-05-26 13:44 UTCEPSS rescore
  49. 2026-05-26 07:18 UTCEPSS rescore
  50. 2026-05-26 07:18 UTCEPSS rescore
  51. 2026-05-20 22:38 UTCEPSS rescore
  52. 2026-05-20 22:38 UTCEPSS rescore
  53. 2026-05-20 17:04 UTCEG score recompute
  54. 2026-05-20 17:04 UTCGHSA enrichment
  55. 2026-05-20 11:22 UTCEPSS rescore
  56. 2026-05-20 11:22 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-40500?
CVE-2026-40500 is a medium vulnerability published on April 15, 2026. ProcessWire CMS version 3.0.255 and prior contain a server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature that allows authenticated administrators to supply arbitrary URLs to the module download parameter, causing the server to issue outbound HTTP requests to…
When was CVE-2026-40500 disclosed?
CVE-2026-40500 was first published in the National Vulnerability Database on April 15, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40500 actively exploited?
CVE-2026-40500 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 69.5% of all scored CVEs.
What is the CVSS score of CVE-2026-40500?
CVE-2026-40500 has a CVSS v3 base score of 6.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 0.0.
How do I remediate CVE-2026-40500?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40500, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-40500

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