CVE-2026-56304

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-06-20. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payloads to bypass RCE blocklists and create lock files or other filesystem artifacts, potentially causing denial of service or application disruption.

CVSS v3
6.5
EG Score
6.5(high)
EPSS
20.7%
KEV
Not listed

Published

June 20, 2026

Last Modified

June 24, 2026

Advisory Details (2)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

picklescan - Arbitrary File Creation via logging.FileHandler Deserialization | Advisories | VulnCheck

https://www.vulncheck.com/advisories/picklescan-arbitrary-file-creation-via-logging-filehandler-deserialization
github Patch Available🟡 PoC Available

Arbitrary file create using logging.FileHandler · Advisory · mmaitre314/picklescan · GitHub

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r

Vendor Advisories for CVE-2026-56304(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 52× 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. 2026-07-06 21:31 UTCEG score recompute
  2. 2026-07-06 21:30 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 19:34 UTCEG score recompute
  8. 2026-07-05 19:34 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 17:40 UTCEG score recompute
  12. 2026-07-04 17:40 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 15:40 UTCEG score recompute
  16. 2026-07-03 15:40 UTCGHSA enrichment
  17. 2026-07-02 13:46 UTCEG score recompute
  18. 2026-07-02 13:46 UTCGHSA enrichment
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 11:53 UTCEG score recompute
  21. 2026-07-01 11:53 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 10:00 UTCEG score recompute
  24. 2026-06-30 09:59 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 27 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 07:59 UTCEG score recompute
  3. 2026-06-29 07:58 UTCGHSA enrichment
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 05:58 UTCEG score recompute
  6. 2026-06-28 05:58 UTCGHSA enrichment
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-28 04:56 UTCEPSS rescore
  9. 2026-06-27 04:05 UTCEG score recompute
  10. 2026-06-27 04:04 UTCGHSA enrichment
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-26 02:10 UTCEG score recompute
  13. 2026-06-26 02:10 UTCGHSA enrichment
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-25 00:17 UTCEG score recompute
  16. 2026-06-25 00:17 UTCGHSA enrichment
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-23 22:22 UTCEG score recompute
  19. 2026-06-23 22:22 UTCGHSA enrichment
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-23 21:33 UTCEPSS rescore
  22. 2026-06-22 20:28 UTCEG score recompute
  23. 2026-06-22 20:28 UTCGHSA enrichment
  24. 2026-06-21 18:33 UTCEG score recompute
  25. 2026-06-21 18:33 UTCGHSA enrichment
  26. 2026-06-20 16:36 UTCEG score recompute
  27. 2026-06-20 16:35 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56304?
CVE-2026-56304 is a medium vulnerability published on June 20, 2026. picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payloads to bypass RCE blocklists and create…
When was CVE-2026-56304 disclosed?
CVE-2026-56304 was first published in the National Vulnerability Database on June 20, 2026, with the most recent update on June 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56304 actively exploited?
CVE-2026-56304 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56304?
CVE-2026-56304 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-56304?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56304, 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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