CVE-2026-35459

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 87% 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, nvd
Elevated
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, pyLoad has a server-side request forgery (SSRF) vulnerability. The fix for CVE-2026-33992 added IP validation to BaseDownloader.download() that checks the hostname of the initial download URL. However, pycurl is configured with FOLLOWLOCATION=1 and MAXREDIRS=10, causing it to automatically follow HTTP redirects. Redirect targets are never validated against the SSRF filter. An authenticated user with ADD permission can bypass the SSRF fix by submitting a URL that redirects to an internal address.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
19.9%
KEV
Not listed

Published

April 6, 2026

Last Modified

April 20, 2026

Advisory Details (2)

Auto-updated May 22, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

SSRF fix bypass via HTTP redirect: CVE-2026-33992 filter validates only initial URL, pycurl follows redirects to internal hosts · Advisory · pyload/pyload · GitHub

https://github.com/pyload/pyload/security/advisories/GHSA-7gvf-3w72-p2pg
generic

fix GHSA-7gvf-3w72-p2pg security advisory · pyload/pyload@33c55da · GitHub

https://github.com/pyload/pyload/commit/33c55da084320430edfd941b60e3da0eb1be9443

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pippyload-ng—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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pyload-ng0.5.0a5.dev528 ... 0.5.0b3.dev96 (101 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 42× 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 127 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-35459?
CVE-2026-35459 is a critical vulnerability published on April 6, 2026. pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, pyLoad has a server-side request forgery (SSRF) vulnerability. The fix for CVE-2026-33992 added IP validation to BaseDownloader.download() that checks the hostname of the initial download URL.…
When was CVE-2026-35459 disclosed?
CVE-2026-35459 was first published in the National Vulnerability Database on April 6, 2026, with the most recent update on April 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35459 actively exploited?
CVE-2026-35459 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35459?
CVE-2026-35459 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-35459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35459, 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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