CVE-2026-127088
2FAuth before 9.0.1 Password Reset Poisoning via Host Header
2FAuth before 9.0.1 contains a weak password recovery vulnerability that allows unauthenticated attackers to poison reset links by forging the HTTP Host header. Attackers can request password or WebAuthn recovery emails with an attacker-controlled host, capture the victim's token, and take over accounts exposing stored TOTP/HOTP secrets.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| 2FAuth Bubka Bubka/2FAuth
github |
≥ 0; < 9.0.1 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.6 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 8.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N | CNA: VulnCheck |
| 4.0 / 8.6 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 8.1 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/Bubka/2FAuth/security/advisories/GHSA-v9qw-r94g-95qvCNA: VulnCheck · vendor-advisory
- https://github.com/Bubka/2FAuth/commit/35ce085b69f9f5044dfb94017c3f27c1dc2668f3CNA: VulnCheck · patch
- https://github.com/Bubka/2FAuth/releases/tag/v9.0.1CNA: VulnCheck · release-notes
- https://github.com/Bubka/2FAuth/blob/v9.0.0/app/Http/Kernel.php#L47CNA: VulnCheck · technical-description
- https://github.com/Bubka/2FAuth/blob/v9.0.0/app/Notifications/WebauthnRecoveryNotification.php#L62-L64CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/2fauth-before-9.0.1-password-reset-poisoning-via-host-headerCNA: VulnCheck · third-party-advisory
- https://github.com/Bubka/2FAuth/blob/v9.0.0/app/Http/Kernel.php#L47[email protected]
- https://github.com/Bubka/2FAuth/blob/v9.0.0/app/Notifications/WebauthnRecoveryNotification.php#L62-L64[email protected]
- https://github.com/Bubka/2FAuth/commit/35ce085b69f9f5044dfb94017c3f27c1dc2668f3[email protected]
- https://github.com/Bubka/2FAuth/releases/tag/v9.0.1[email protected]
- https://github.com/Bubka/2FAuth/security/advisories/GHSA-v9qw-r94g-95qv[email protected]
- https://www.vulncheck.com/advisories/2fauth-before-9.0.1-password-reset-poisoning-via-host-header[email protected]
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