What’s Vulnerable › Vulnerabilities

CVE-2026-53981: Cap-go < v12.128.2 Account Takeover via Unauthenticated Email Change Mechanism

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-12 · updated 2026-06-17
• Weakness: CWE-306

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.

Affected products

• Cap-go: before 12.128.2 — fixed in 12.128.2

How to fix

Upgrade to a fixed version: Cap-go 12.128.2. Check the vendor advisory for mitigations.

References

• 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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