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CVE-2026-81179: SysReptor: Host header injection might allow account takeover

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-09-18
• Weakness: CWE-807

Description

SysReptor is a fully customizable pentest reporting platform. Prior to 2026.58, installations that enable password reset by email while configuring ALLOWED_HOSTS with a wildcard accept an attacker-controlled Host header when generating a password reset link. An unauthenticated attacker can request a reset email whose link points to an attacker-controlled system, and a victim who follows that link can disclose the reset token, allowing the attacker to reset the victim's password and take over the account. Exploitation also requires a configured email gateway and an email address for the victim, while some reverse proxy configurations may reject the hostile Host header. This issue is fixed in version 2026.58.

Affected products

• Syslifters sysreptor: before 2026.58

References

• https://github.com/Syslifters/sysreptor/commit/7ecf56a6b8e5c05a2d2212bc8aa340f69855cdea
• https://github.com/Syslifters/sysreptor/releases/tag/2026.58
• https://github.com/Syslifters/sysreptor/security/advisories/GHSA-9x2r-5pff-8w6c

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