CVE-2026-56315

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-23. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

picklescan before 1.0.4 fails to block at least seven Python standard library modules (including uuid, _osx_support, _aix_support, _pyrepl.pager, and imaplib) exposing eight functions that provide direct arbitrary command execution. Attackers can craft malicious pickle files importing these unblocked modules to achieve remote code execution while bypassing picklescan's safety validation entirely.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

June 23, 2026

Last Modified

June 23, 2026

Advisory Details (2)

Auto-updated Jul 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Multiple stdlib modules with direct RCE not in blocklist · Advisory · mmaitre314/picklescan · GitHub

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-g38g-8gr9-h9xp
generic

picklescan - Remote Code Execution via Unblocked Standard Library Modules | Advisories | VulnCheck

https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-unblocked-standard-library-modules

Vendor Advisories for CVE-2026-56315(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
picklescan0.0.1 ... 1.0.3 (39 versions)1.0.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 172× 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 200 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56315?
CVE-2026-56315 is a critical vulnerability published on June 23, 2026. picklescan before 1.0.4 fails to block at least seven Python standard library modules (including uuid, osxsupport, aixsupport, _pyrepl.pager, and imaplib) exposing eight functions that provide direct arbitrary command execution. Attackers can craft malicious pickle files importing these unblocked…
When was CVE-2026-56315 disclosed?
CVE-2026-56315 was first published in the National Vulnerability Database on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56315 actively exploited?
CVE-2026-56315 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 48.6% of all scored CVEs.
What is the CVSS score of CVE-2026-56315?
CVE-2026-56315 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-56315?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56315, 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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