CVE-2021-34141

An incomplete string comparison in the numpy.core component in NumPy before 1.22.0 allows attackers to trigger slightly incorrect copying by constructing specific string objects. NOTE: the vendor states that this reported code behavior is "completely harmless."

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

1.7% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-25)

CWE

CWE-697

Published

2021-12-17

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• numpy:numpy
• oracle:communications_cloud_native_core_policy

Packages (OSV)

References

• https://github.com/numpy/numpy/issues/18993
• https://www.oracle.com/security-alerts/cpujul2022.html
• https://github.com/numpy/numpy/issues/18993
• https://www.oracle.com/security-alerts/cpujul2022.html

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