Is CVE-2026-3276 in the CISA KEV catalog?

No. CVE-2026-3276 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the EPSS score for CVE-2026-3276?

CVE-2026-3276 has an EPSS score of 0.49% (39th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-3276?

No published fix for CVE-2026-3276 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-3276

UNSCORED

NVD

Description

unicodedata.normalize() can take excessive CPU time when processing specially crafted Unicode input containing long runs of combining characters with alternating Canonical Combining Class values. This affects all normalization forms.

CWE-407

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.49%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Other references9

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-16.