Fickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, the unsafe_imports() method in Fickling's static analyzer fails to flag several high-risk Python modules that can be used for arbitrary code execution. Malicious pickles importing these modules will not be detected as unsafe, allowing attackers to bypass Fickling's primary static safety checks. This issue has been patched in version 0.1.7.
CVE-2026-22609
This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 80% 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).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(medium)
- EPSS
- 42.9%
- KEV
- Not listed
Published
January 10, 2026
Last Modified
January 16, 2026
References (7)
- security-advisories@githubhttps://github.com/trailofbits/fickling/commit/29d5545e74b07766892c1f0461b801afccee4f91
- security-advisories@githubhttps://github.com/trailofbits/fickling/commit/9a2b3f89bd0598b528d62c10a64c1986fcb09f66
- security-advisories@githubhttps://github.com/trailofbits/fickling/commit/b793563e60a5e039c5837b09d7f4f6b92e6040d1
- security-advisories@githubhttps://github.com/trailofbits/fickling/commit/eb299b453342f1931c787bcb3bc33f3a03a173f9
- security-advisories@githubhttps://github.com/trailofbits/fickling/releases/tag/v0.1.7
- security-advisories@githubhttps://github.com/trailofbits/fickling/security/advisories/GHSA-q5qq-mvfm-j35x
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/trailofbits/fickling/security/advisories/GHSA-q5qq-mvfm-j35x
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| fickling | 0.0.1 ... 0.1.6 (13 versions) | 0.1.7 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 12× in last 7d / 50× 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.
- 2026-07-22 14:08 UTCEPSS rescore
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- 2026-05-29 16:21 UTCEG score recompute
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Frequently asked(5)
What is CVE-2026-22609?
When was CVE-2026-22609 disclosed?
Is CVE-2026-22609 actively exploited?
What is the CVSS score of CVE-2026-22609?
How do I remediate CVE-2026-22609?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-22609
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