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Vulnerability record · CVE-2026-53981 · published 12 June 2026

CVE-2026-53981: Missing authentication for critical function vulnerability

Cap-go prior to 12.128.2 contains an account takeover vulnerability in its email change mechanism that allows an attacker with temporary authenticated session access to change the registered email address without re-authentication such as password or MFA verification. Attackers can redirect verification to an attacker-controlled email address and subsequently perform a password reset to permanently take over the victim's account.

7.2 CVSS 4.0 High EPSS 0.48% · top 61.1% CWE-306 · Missing authentication for critical function Deferred
7.2CVSS 4.0 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Cap-go prior to 12.128.2 contains an account takeover vulnerability in its email change mechanism that allows an attacker with temporary authenticated session access to change the registered email address without re-authentication such as password or MFA verification. Attackers can redirect verification to an attacker-controlled email address and subsequently perform a password reset to permanently take over the victim's account.

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:

References

LinkTags
https://github.com/Cap-go/capgo/commit/6685e5f11adef257bf3d085e481f4d8ebcec602e
https://github.com/Cap-go/capgo/security/advisories/GHSA-w56g-jv78-hf79
https://www.vulncheck.com/advisories/cap-go-account-takeover-via-unauthenticated-email-change-mechanism
https://github.com/Cap-go/capgo/security/advisories/GHSA-w56g-jv78-hf79

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Source: NIST National Vulnerability Database (record CVE-2026-53981), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.