CVE-2026-40500

✕ Withdrawn — historical dataMEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

Score 6.8 from GitHub Security Advisory published 2026-04-16. NVD baseline CVSS 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.8Exploit: NoneExposed: 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
6.8(medium)
EPSS
30.5%
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 0× in last 7d / 25× 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. 2026-07-09 19:10 UTCEPSS rescore
  2. 2026-07-08 15:15 UTCEPSS rescore
  3. 2026-07-07 13:46 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-04 06:31 UTCEPSS rescore
  9. 2026-07-01 15:06 UTCEPSS rescore
  10. 2026-06-30 23:22 UTCEPSS rescore
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-27 03:08 UTCEPSS rescore
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-25 13:49 UTCEPSS rescore
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-19 19:25 UTCEPSS rescore
  24. 2026-06-18 17:52 UTCEPSS rescore
  25. 2026-06-18 17:52 UTCEPSS rescore
Show 54 more
  1. 2026-06-17 17:53 UTCEPSS rescore
  2. 2026-06-16 17:52 UTCEPSS rescore
  3. 2026-06-15 17:49 UTCEPSS rescore
  4. 2026-06-14 20:40 UTCGHSA enrichment
  5. 2026-06-12 23:12 UTCEPSS rescore
  6. 2026-06-12 23:12 UTCEPSS rescore
  7. 2026-06-11 18:58 UTCGHSA enrichment
  8. 2026-06-11 14:00 UTCEPSS rescore
  9. 2026-06-10 13:22 UTCEPSS rescore
  10. 2026-06-10 13:22 UTCEPSS rescore
  11. 2026-06-10 08:44 UTCGHSA enrichment
  12. 2026-06-09 10:10 UTCGHSA enrichment
  13. 2026-06-08 14:17 UTCEPSS rescore
  14. 2026-06-08 14:17 UTCEPSS rescore
  15. 2026-06-08 03:39 UTCGHSA enrichment
  16. 2026-06-07 15:25 UTCEPSS rescore
  17. 2026-06-07 15:25 UTCEPSS rescore
  18. 2026-06-07 05:05 UTCGHSA enrichment
  19. 2026-06-06 13:47 UTCEPSS rescore
  20. 2026-06-06 13:47 UTCEPSS rescore
  21. 2026-06-05 22:47 UTCEPSS rescore
  22. 2026-06-05 06:10 UTCEPSS rescore
  23. 2026-06-05 06:10 UTCEPSS rescore
  24. 2026-06-04 13:12 UTCEPSS rescore
  25. 2026-06-04 13:12 UTCEPSS rescore
  26. 2026-06-03 18:52 UTCGHSA enrichment
  27. 2026-06-02 20:13 UTCEPSS rescore
  28. 2026-06-02 17:10 UTCGHSA enrichment
  29. 2026-06-01 18:28 UTCGHSA enrichment
  30. 2026-06-01 13:52 UTCEPSS rescore
  31. 2026-06-01 13:52 UTCEPSS rescore
  32. 2026-06-01 13:51 UTCEPSS rescore
  33. 2026-05-31 22:30 UTCEPSS rescore
  34. 2026-05-31 22:30 UTCEPSS rescore
  35. 2026-05-31 00:16 UTCEPSS rescore
  36. 2026-05-31 00:16 UTCEPSS rescore
  37. 2026-05-31 00:16 UTCEPSS rescore
  38. 2026-05-29 13:44 UTCEPSS rescore
  39. 2026-05-29 13:44 UTCEPSS rescore
  40. 2026-05-28 13:44 UTCEPSS rescore
  41. 2026-05-28 13:44 UTCEPSS rescore
  42. 2026-05-28 13:44 UTCEPSS rescore
  43. 2026-05-27 13:40 UTCEPSS rescore
  44. 2026-05-27 13:40 UTCEPSS rescore
  45. 2026-05-27 13:40 UTCEPSS rescore
  46. 2026-05-26 13:44 UTCEPSS rescore
  47. 2026-05-26 07:18 UTCEPSS rescore
  48. 2026-05-26 07:18 UTCEPSS rescore
  49. 2026-05-20 22:38 UTCEPSS rescore
  50. 2026-05-20 22:38 UTCEPSS rescore
  51. 2026-05-20 17:04 UTCEG score recompute
  52. 2026-05-20 17:04 UTCGHSA enrichment
  53. 2026-05-20 11:22 UTCEPSS rescore
  54. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same product + same CWE)

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 30.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40500?
CVE-2026-40500 has a CVSS v3 base score of 6.8 (NVD).
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

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