What is CVE-2026-82973?

CVE-2026-82973 is a critical-severity vulnerability in Psyb0t Docker-Mailbox, classified under CRLF Injection. CVSS score: 9.4/10. Published 2026-09-29.

How severe is CVE-2026-82973?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Vulnerability in Psyb0t Docker-Mailbox

CVE-2026-82973

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.

Vulnerability class: CRLF Injection

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Psyb0t Docker-Mailbox

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

gitlab.com/psyb0t/docker-mailbox/-/commit/90e6b492d42e011d0ba2c825795b33d054ee6…

Frequently asked questions

What is CVE-2026-82973?: CVE-2026-82973 is a critical-severity vulnerability in Psyb0t Docker-Mailbox, classified under CRLF Injection. CVSS score: 9.4/10. Published 2026-09-29.
How severe is CVE-2026-82973?: Critical severity. CVSS v3 base score is 9.4 out of 10.