CVE-2026-13576
UNSCOREDDescription
CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes. Passwords are hashed with hmac_sha1_sum() from Mojo::Util with no key, a single fast SHA-1 HMAC. There is no salt, so equal passwords give equal hashes, and no work factor slows down guessing. An attacker who obtains the user table can recover passwords by fast offline guessing.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3.1 Vector
No CVSS vector data available.
Exploit Intelligence
EPSS data unavailable for this CVE.
References
Related Vulnerabilities
Other CWE-759 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-1430 | Medium | 6.5 | 0.8% | - | - |
| CVE-2021-21253 | Medium | 5.8 | 0.7% | - | Fix |
| CVE-2020-16244 | High | 7.2 | 0.7% | - | - |
| CVE-2020-25164 | Medium | 6.5 | 0.6% | - | - |
| CVE-2025-34208 | High | 7.5 | 0.4% | - | - |
| CVE-2025-15544 | Medium | 5.9 | 0.3% | - | - |
Common questions
How do I fix CVE-2026-13576?
No published fix for CVE-2026-13576 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-30.