CVE-2026-13576
CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes
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.
- Record
CVE-2026-13576- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-916, CWE-759
- Updated
- 2026-11-06
EUVDEUVD-2026-113913
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.
- Record
EUVD-2026-113913- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-6v4f-gp6f-2gvj
CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes. ...
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.
- Record
GHSA-6v4f-gp6f-2gvj- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-759
- Updated
- 2026-11-06
NVD
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.
- Record
CVE-2026-13576- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-759, CWE-916
- Updated
- 2026-11-06
History
| Recorded | Changed | Sources |
|---|---|---|
| facts, severity | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-13576 is a high vulnerability (CVSS 7.5), published October 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. No source names a fixed version.