SB2026022744 - Multiple vulnerabilities in wger

Description

This security bulletin contains information about 3 vulnerabilities.

1) Authorization bypass through user-controlled key (CVE-ID: CVE-2026-27835)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the IDOR issue in RepetitionsConfig and MaxRepetitionsConfig. A remote user can gain access to sensitive information on the target system.

2) Authorization bypass through user-controlled key (CVE-ID: CVE-2026-27838)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the IDOR issue in user-unscoped cache keys on routine API. A remote user can gain access to sensitive information on the target system.

3) Authorization bypass through user-controlled key (CVE-ID: CVE-2026-27839)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the IDOR issue in nutritional_values endpoints. A remote user can gain access to sensitive information on the target system.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://github.com/wger-project/wger/security/advisories/GHSA-xf68-8hjw-7mpm
• https://github.com/wger-project/wger/security/advisories/GHSA-42cr-w2gr-m54q
• https://github.com/wger-project/wger/security/advisories/GHSA-g8gc-6c4h-jg86