Is CVE-2026-39825 actively exploited?

No active exploitation of CVE-2026-39825 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39825 be exploited remotely?

Yes. CVE-2026-39825 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39825?

CVE-2026-39825 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-39825

Published: May 7, 2026· Updated: May 13, 2026

5.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:0.7th

Official Description

ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.

NVD Source

Technical Analysis

CVE-2026-39825 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.