CVE-2026-82973 Improper Neutralization of CRLF Sequences ('CRLF Injection') in docker-mailbox
Remote attackers can inject IMAP commands into authenticated sessions if bearer-token authentication is disabled, allowing unauthorized mailbox access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82973?
CVE-2026-82973 is a critical vulnerability in psyb0t docker-mailbox, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-93
Which versions are affected by CVE-2026-82973?
How do I fix CVE-2026-82973?
No fix has been published for CVE-2026-82973 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82973 being exploited?
There is no known exploitation of CVE-2026-82973 in the wild and no public exploit code.
Sources
Also known as GHSA-j4qm-pqjf-933v.