How severe is CVE-2026-31223?

CVE-2026-31223 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-31223 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31223?

CVE-2026-31223 affects Snorkel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31223?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-31223 have an EU (EUVD) identifier?

Yes. CVE-2026-31223 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29507.

When was CVE-2026-31223 published?

CVE-2026-31223 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-31223

CVE-2026-31223 is a high-severity vulnerability in Snorkel with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29507
Weakness: CWE-502
Affected product: Snorkel
Published: 2026-05-12
Last modified: 2026-06-17

Description

The snorkel library thru v0.10.0 contains a critical insecure deserialization vulnerability (CWE-502) in the BaseLabeler.load() method of the BaseLabeler class. The method loads serialized labeler models using the unsafe pickle.load() function on user-supplied file paths without any validation or security controls. Python's pickle module is inherently dangerous for deserializing untrusted data, as it can execute arbitrary code during the deserialization process. A remote attacker can exploit this by providing a maliciously crafted pickle file, leading to arbitrary code execution on the victim's system when the file is loaded via the vulnerable method.

Frequently asked questions

What is CVE-2026-31223?: The snorkel library thru v0.10.0 contains a critical insecure deserialization vulnerability (CWE-502) in the BaseLabeler.load() method of the BaseLabeler class. The method loads serialized labeler models using the unsafe pickle.load() function on user-supplied file paths without any validation or security controls. Python's pickle module is inherently dangerous for deserializing untrusted data, as it can execute arbitrary code during the deserialization process. A remote attacker can exploit this by providing a maliciously crafted pickle file, leading to arbitrary code execution on the victim's system when the file is loaded via the vulnerable method.
How severe is CVE-2026-31223?: CVE-2026-31223 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-31223 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31223?: CVE-2026-31223 affects Snorkel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31223?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-31223 have an EU (EUVD) identifier?: Yes. CVE-2026-31223 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29507.
When was CVE-2026-31223 published?: CVE-2026-31223 was published on 2026-05-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:snorkel:snorkel:*:*:*:*:*:*:*:*

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