Is there a public exploit for CVE-2026-13576?

No public exploit for CVE-2026-13576 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

— Unscored

CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes.

CVE-2026-13576

CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes. Passwords are hashed with hmacsha1sum() 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.

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 30 October 2026
Weakness: CWE-759, CWE-916
Assigner: 9b29abf9-4ab0-4765-b253-1875cd9b441e

At the source

References

https://metacpan.org/release/OETIKER/CallBackery-0.62.0/changes

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