PkgSeer

Vulnerability GHSA-5957-c7qm-m469

Low Risk
LOW RISK
CVSS Score: 3.7
Score Range: < 4.0
Low severity vulnerabilities (CVSS < 4.0). Hygiene issues that can accumulate but pose lower immediate risk.
11 hours ago
November 10, 2026 at 09:28 PM UTC
Action Mailbox: Possible signature replay in Action Mailbox Mailgun ingress
0.1.0 and 6.0.0.beta1 and 6.0.0.beta2 and 6.0.0.beta3 and 6.0.0.rc1 and 6.0.0.rc2 and 6.0.0 and 6.0.1.rc1 and 6.0.1 and 6.0.2.rc1 and 6.0.2.rc2 and 6.0.2 and 6.0.2.1 and 6.0.2.2 and 6.0.3.rc1 and 6.0.3 and 6.0.3.1 and 6.0.3.2 and 6.0.3.3 and 6.0.3.4 and 6.0.3.5 and 6.0.3.6 and 6.0.3.7 and 6.0.4 and 6.0.4.1 and 6.0.4.2 and 6.0.4.3 and 6.0.4.4 and 6.0.4.5 and 6.0.4.6 and 6.0.4.7 and 6.0.4.8 and 6.0.5 and 6.0.5.1 and 6.0.6 and 6.0.6.1 and 6.1.0.rc1 and 6.1.0.rc2 and 6.1.0 - 6.1.2 and 6.1.2.1 and 6.1.3 and 6.1.3.1 and 6.1.3.2 and 6.1.4 and 6.1.4.1 and 6.1.4.2 and 6.1.4.3 and 6.1.4.4 and 6.1.4.5 and 6.1.4.6 and 6.1.4.7 and 6.1.5 and 6.1.5.1 and 6.1.6 and 6.1.6.1 and 6.1.7 and 6.1.7.1 and 6.1.7.2 and 6.1.7.3 and 6.1.7.4 and 6.1.7.5 and 6.1.7.6 and 6.1.7.7 and 6.1.7.8 and 6.1.7.9 and 6.1.7.10 and 7.0.0.alpha1 and 7.0.0.alpha2 and 7.0.0.rc1 and 7.0.0.rc2 and 7.0.0.rc3 and 7.0.0 - 7.0.2 and 7.0.2.1 and 7.0.2.2 and 7.0.2.3 and 7.0.2.4 and 7.0.3 and 7.0.3.1 and 7.0.4 and 7.0.4.1 and 7.0.4.2 and 7.0.4.3 and 7.0.5 and 7.0.5.1 and 7.0.6 - 7.0.7 and 7.0.7.1 and 7.0.7.2 and 7.0.8 and 7.0.8.1 and 7.0.8.2 and 7.0.8.3 and 7.0.8.4 and 7.0.8.5 and 7.0.8.6 and 7.0.8.7 and 7.0.10 and 7.1.0.beta1 and 7.1.0.rc1 and 7.1.0.rc2 and 7.1.0 - 7.1.3 and 7.1.3.1 and 7.1.3.2 and 7.1.3.3 and 7.1.3.4 and 7.1.4 and 7.1.4.1 and 7.1.4.2 and 7.1.5 and 7.1.5.1 and 7.1.5.2 and 7.1.6 and 7.2.0.beta1 and 7.2.0.beta2 and 7.2.0.beta3 and 7.2.0.rc1 and 7.2.0 - 7.2.1 and 7.2.1.1 and 7.2.1.2 and 7.2.2 and 7.2.2.1 and 7.2.2.2 and 7.2.3 and 7.2.3.1 and 7.2.3.2 and 7.2.4 and 8.0.0.beta1 and 8.0.0.rc1 and 8.0.0.rc2 and 8.0.0 and 8.0.0.1 and 8.0.1 - 8.0.2 and 8.0.2.1 and 8.0.3 - 8.0.4 and 8.0.4.1 and 8.0.5 and 8.0.5.1 and 8.1.0.beta1 and 8.1.0.rc1 and 8.1.0 - 8.1.2 and 8.1.2.1 and 8.1.3 and 8.1.3.1 and 8.1.4
0.1.0 and 6.0.0.beta1 and 6.0.0.beta2 and 6.0.0.beta3 and 6.0.0.rc1 and 6.0.0.rc2 and 6.0.0 and 6.0.1.rc1 and 6.0.1 and 6.0.2.rc1 and 6.0.2.rc2 and 6.0.2 and 6.0.2.1 and 6.0.2.2 and 6.0.3.rc1 and 6.0.3 and 6.0.3.1 and 6.0.3.2 and 6.0.3.3 and 6.0.3.4 and 6.0.3.5 and 6.0.3.6 and 6.0.3.7 and 6.0.4 and 6.0.4.1 and 6.0.4.2 and 6.0.4.3 and 6.0.4.4 and 6.0.4.5 and 6.0.4.6 and 6.0.4.7 and 6.0.4.8 and 6.0.5 and 6.0.5.1 and 6.0.6 and 6.0.6.1 and 6.1.0.rc1 and 6.1.0.rc2 and 6.1.0 - 6.1.2 and 6.1.2.1 and 6.1.3 and 6.1.3.1 and 6.1.3.2 and 6.1.4 and 6.1.4.1 and 6.1.4.2 and 6.1.4.3 and 6.1.4.4 and 6.1.4.5 and 6.1.4.6 and 6.1.4.7 and 6.1.5 and 6.1.5.1 and 6.1.6 and 6.1.6.1 and 6.1.7 and 6.1.7.1 and 6.1.7.2 and 6.1.7.3 and 6.1.7.4 and 6.1.7.5 and 6.1.7.6 and 6.1.7.7 and 6.1.7.8 and 6.1.7.9 and 6.1.7.10 and 7.0.0.alpha1 and 7.0.0.alpha2 and 7.0.0.rc1 and 7.0.0.rc2 and 7.0.0.rc3 and 7.0.0 - 7.0.2 and 7.0.2.1 and 7.0.2.2 and 7.0.2.3 and 7.0.2.4 and 7.0.3 and 7.0.3.1 and 7.0.4 and 7.0.4.1 and 7.0.4.2 and 7.0.4.3 and 7.0.5 and 7.0.5.1 and 7.0.6 - 7.0.7 and 7.0.7.1 and 7.0.7.2 and 7.0.8 and 7.0.8.1 and 7.0.8.2 and 7.0.8.3 and 7.0.8.4 and 7.0.8.5 and 7.0.8.6 and 7.0.8.7 and 7.0.10 and 7.1.0.beta1 and 7.1.0.rc1 and 7.1.0.rc2 and 7.1.0 - 7.1.3 and 7.1.3.1 and 7.1.3.2 and 7.1.3.3 and 7.1.3.4 and 7.1.4 and 7.1.4.1 and 7.1.4.2 and 7.1.5 and 7.1.5.1 and 7.1.5.2 and 7.1.6 and 7.2.0.beta1 and 7.2.0.beta2 and 7.2.0.beta3 and 7.2.0.rc1 and 7.2.0 - 7.2.1 and 7.2.1.1 and 7.2.1.2 and 7.2.2 and 7.2.2.1 and 7.2.2.2 and 7.2.3 and 7.2.3.1 and 7.2.3.2 and 7.2.4 and 8.0.0.beta1 and 8.0.0.rc1 and 8.0.0.rc2 and 8.0.0 and 8.0.0.1 and 8.0.1 - 8.0.2 and 8.0.2.1 and 8.0.3 - 8.0.4 and 8.0.4.1 and 8.0.5 and 8.0.5.1 and 8.1.0.beta1 and 8.1.0.rc1 and 8.1.0 - 8.1.2 and 8.1.2.1 and 8.1.3 and 8.1.3.1 and 8.1.4

Summary

Action Mailbox: Possible signature replay in Action Mailbox Mailgun ingress

Details

Impact

The Action Mailbox Mailgun ingress authenticates a request with an HMAC of the timestamp and token parameters concatenated without a separator, and ActionMailbox::Ingresses::Mailgun::InboundEmailsController::Authenticator#recent? rejects only timestamps more than 2 minutes in the past. Because the signature does not fix the boundary between the two values, a captured signed request can be presented with a timestamp far in the future, which the ingress then accepts indefinitely. An attacker who obtains one signed Mailgun webhook request, but not the signing key, could submit arbitrary inbound email that Action Mailbox processes as genuine, possibly leading to forged messages attributed to the sender of the attacker's choosing.

Applications that receive inbound email through the Action Mailbox Mailgun ingress are affected.

Details

The fixed releases also reject a Mailgun request whose timestamp is more than 2 minutes ahead of the server's clock, as they already did for one more than 2 minutes behind it. An application whose clock runs more than 2 minutes behind Mailgun's will now reject genuine webhooks and should synchronize its clock.

Releases

The fixed releases are available at the normal locations.

Patches for those who cannot upgrade at once:

Credit

This issue was responsibly reported by HackerOne researcher davutselcuk.

Impacted packages

Timeline

Published
11 hours ago
November 10, 2026 at 09:28 PM UTC
Fixed (8.1.4.1)
7 days ago
November 04, 2026 at 02:47 AM UTC
Last Modified
11 hours ago
November 10, 2026 at 09:45 PM UTC