Is CVE-2026-54283 actively exploited?

No active exploitation of CVE-2026-54283 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54283 be exploited remotely?

Yes. CVE-2026-54283 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54283?

CVE-2026-54283 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-54283

CWE-770Published: June 22, 2026· Updated: Jun 26, 2026

7.5

CVSS v3.1

EPSS:0.27%probability of exploitation in 30 daysPercentile:19.0th

Official Description

Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply. This vulnerability is fixed in 1.3.1.

NVD Source

Technical Analysis

CVE-2026-54283 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.