What is CVE-2026-13577?

CVE-2026-13577 is a high-severity vulnerability in Cromedome Dancer2, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 8.2/10. Published 2026-07-20.

How severe is CVE-2026-13577?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Cromedome Dancer2

CVE-2026-13577

Dancer2 versions through 2.1.0 for Perl generate insecure session ids when CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id when both Math::Random…

EPSS: 0.001 (4.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

Affected products

Cromedome Dancer2 — versions 0

Weakness classification (CWE)

CWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CWE-340

References

9b29abf9-4ab0-4765-b253-1875cd9b441e
9b29abf9-4ab0-4765-b253-1875cd9b441e (related)

Frequently asked questions

What is CVE-2026-13577?: CVE-2026-13577 is a high-severity vulnerability in Cromedome Dancer2, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 8.2/10. Published 2026-07-20.
How severe is CVE-2026-13577?: High severity. CVSS v3 base score is 8.2 out of 10.