Vulnerability in Berov Ado\
CVE-2026-5083
Ado::Sessions versions through 0.935 for Perl generates insecure session ids. The session id is generated from 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. Predicable session ids could allow an attacker to gain access to systems. Note that Ado is no longer maintained, and has been removed from the CPAN index. It is still available on BackPAN.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (42.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Berov Ado\ — versions \
- Berov Ado::sessions — versions 0
- Berov Ado\:\:sessions
Weakness classification (CWE)
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking, Issue Tracking)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (Product)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (technical-description, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
Frequently asked questions
- What is CVE-2026-5083?
- CVE-2026-5083 is a medium-severity vulnerability in Berov Ado\, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 5.3/10. Published 2026-04-08.
- How severe is CVE-2026-5083?
- Medium severity. CVSS v3 base score is 5.3 out of 10.