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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
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53981 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53981

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53981 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53981

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.