Improper Neutralization of CRLF Sequences ('CRLF Injection') in docker-mailbox (CVE-2026-82973) | HOL Guard CVE

Critical · CVSS 9.4CVE-2026-82973

Improper Neutralization of CRLF Sequences ('CRLF Injection') in docker-mailbox

Answer in brief

CVE-2026-82973 records a Critical severity (CVSS 9.4) vulnerability in Improper Neutralization of CRLF Sequences ('CRLF Injection') in docker-mailbox. The current sources do not mark it as known exploited. The current feed maps psyb0t/docker-mailbox (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 29, 2026Source checked Sep 29, 2026First seen by HOL Sep 29, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps psyb0t/docker-mailbox (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
psyb0t/docker-mailboxgeneric	>=0.1.0 <=0.4.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for psyb0t/docker-mailbox.
Review the reported fix. Source-reported solution: Upgrade to version 0.4.13 or later.

Evidence timeline and material changes

Published upstream
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 29, 2026

Sources and claim methodology

Source referencegitlab.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.