Is CVE-2026-3255 actively exploited?

No active exploitation of CVE-2026-3255 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3255 be exploited remotely?

Yes. CVE-2026-3255 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3255?

CVE-2026-3255 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-3255

CWE-338Published: February 27, 2026· Updated: Mar 4, 2026

6.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.2th

Official Description

HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand() function.

The HTTP::Session2 session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand() function is unsuitable for cryptographic usage.

HTTP::Session2 after version 1.02 will attempt to use the /dev/urandom device to generate a session id, but if the device is unavailable (for example, under Windows), then it will revert to the insecure method described above.

NVD Source

Technical Analysis

CVE-2026-3255 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.