CVE Watch28 sept 2026

CVE-2026-56727

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, summary In Zammad's inbound PGP email processing, the re

CVSS

—

Sin CVSS

EPSS

0.2%

p16

KEV

—

Exploit Today

0-100

Publicado: 25 sept 2026 · Última mod.: 28 sept 2026 · CWE-287 · CWE-347 · CWE-391

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-09-262026-10-25

Descripción técnica

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, summary In Zammad's inbound PGP email processing, the return value of the gpg verification call was silently discarded. Regardless of whether gpg reported a valid, invalid, or missing signature, the handler unconditionally wrote sign: { success: true, comment: "Good signature" } to the article's security preferences. Impact Any sender could tamper with the body of a multipart/signed PGP email, or craft a message with an entirely fabricated or mismatched signature, and Zammad would display it to the recipient as cryptographically verified with a "Good signature" label. Users and agents relying on Zammad's signature indicator to confirm message authenticity and integrity would be misled into trusting modified or forged content. The vulnerability affects all inbound PGP-signed emails processed while the PGP integration is enabled. This issue is fixed in version 7.0.2.

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