Is CVE-2026-101021 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-101021?

CVE-2026-101021 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-101021

Description

MultipartInputStream performs inefficient boundary matching and unnecessary buffer copying. Crafted multipart input can force excessive boundary comparisons and repeated copying.