CVE-2026-13576
CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1…
- Risk score
- 50/100
- CVSS
- 7.5 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 30 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 use…
- Affected
- See advisory
- Fix
- Upgrade the product to 0.62.0 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.5 high
- Remotely exploitable without logging in
References
Original description
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.
Last activity 30 Oct 2026. Patch Forecast updates every hour.