Is CVE-2026-54275 actively exploited?

No active exploitation of CVE-2026-54275 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54275 be exploited remotely?

Yes. CVE-2026-54275 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54275?

CVE-2026-54275 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-54275

CWE-297Published: June 22, 2026· Updated: Jun 26, 2026

7.5

CVSS v3.1

EPSS:0.25%probability of exploitation in 30 daysPercentile:16.6th

Official Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the server_hostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request server_hostname parameters, then the later calls may succeed by reusing the existing connection when they should have been rejected due to the TLS SNI check. This vulnerability is fixed in 3.14.1.

NVD Source

Technical Analysis

CVE-2026-54275 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.