PatchSiren cyber security CVE debrief
CVE-2026-53981 Cap-go CVE debrief
CVE-2026-53981 is a HIGH severity vulnerability in Cap-go prior to 12.128.2. The vulnerability exists in the email change mechanism, allowing an attacker with temporary authenticated session access to change the registered email address without re-authentication, such as password or MFA verification. This enables attackers to redirect verification to an attacker-controlled email address and subsequently perform a password reset to permanently take over the victim's account.
- Vendor
- Cap-go
- Product
- Unknown
- CVSS
- HIGH 7.2
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-12
- Original CVE updated
- 2026-06-12
- Advisory published
- 2026-06-12
- Advisory updated
- 2026-06-12
Who should care
Users of Cap-go prior to version 12.128.2 should update to the latest version to mitigate this vulnerability.
Technical summary
The vulnerability has a CVSS score of 7.2 and is classified as HIGH severity. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/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.
Defensive priority
HIGH
Recommended defensive actions
- Update Cap-go to version 12.128.2 or later.
- Review and update authentication and authorization mechanisms for email changes.
Evidence notes
The vulnerability was reported by Vulncheck and is publicly disclosed.
Official resources
CVE-2026-53981 was published on 2026-06-12T17:16:26.567Z and modified on 2026-06-12T18:16:35.597Z.