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9.4
CVE-2026-82973: docker-mailbox may let attackers insert extra IMAP commands
CVE-2026-82973 · published 1 month ago
Summary
Versions of docker-mailbox before 0.4.13 can be tricked into sending additional commands to the email server when an attacker supplies specially crafted folder, UID, or search values. This is possible only when bearer‑token authentication is not enabled, allowing an unauthenticated remote user to tamper with the mailbox connection. Resolve it by upgrading to version 0.4.13 or later, or by enabling bearer‑token authentication and restricting input to trusted sources.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| psyb0t | docker-mailbox | <= 0.4.12 |
Original advisory text
Improper Neutralization of CRLF Sequences ('CRLF Injection') in docker-mailbox
Improper neutralization of CRLF sequences in IMAP command construction in psyb0t/docker-mailbox before 0.4.13 allows a remote unauthenticated attacker, when bearer-token authentication is not configured, to inject additional IMAP commands into an authenticated upstream mailbox connection via crafted folder, UID, or search values.
References
- https://gitlab.com/psyb0t/docker-mailbox/-/commit/90e6b492d42e011d0ba2c825795b33... Patch
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82973... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-82973 Vendor Advisory
- https://gitlab.com/psyb0t/docker-mailbox Product
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically
- Gives an attacker partial control
Type
CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')
Timeline
Published29 Sep 2026
Updated4 Nov 2026
First seen29 Sep 2026
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