Is CVE-2026-5084 actively exploited?

No active exploitation of CVE-2026-5084 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5084 be exploited remotely?

Yes. CVE-2026-5084 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5084?

CVE-2026-5084 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-5084

CWE-338Published: May 11, 2026· Updated: May 12, 2026

6.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.0th

Official Description

WebDyne::Session versions through 2.075 for Perl generates the session id insecurely.

The session handler generates the session id from an MD5 hash seeded with a call to the built-in rand() function. The rand function is passed a maximum value based on the process id, the epoch time and the reference address of the object, but this information will have no effect on the overall quality of the seed of the message digest.

The rand function is seeded by 32-bits and is predictable. It is considered unsuitable for cryptographic purposes.

Predictable session ids could allow an attacker to gain access to systems.

Note that WebDyne::Session versions 1.042 and earlier appear to be in separate distributions from WebDyne.

NVD Source

Technical Analysis

CVE-2026-5084 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.