Medium [CVE-2026-82661] Header injection via unsanitized list comment fields
This medium-severity Red Hat Linux advisory covers CVE-2026-82661 affecting Red Hat Developer Hub, Self-service automation portal 2.
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Summary
Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, allowing attackers to inject arbitrary message headers. An attacker with control over list.*.comment parameters can inject CRLF sequences to create additional headers in generated RFC822 messages, altering mail client behavior and message semantics.
A flaw was found in Nodemailer, an email sending library. By failing to sanitize carriage return and line feed (CRLF) characters, an attacker can alter mail client behavior and message semantics, potentially leading to email spoofing or other integrity issues.
Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N). Weakness: CWE-93.
Affected Red Hat products: Red Hat Developer Hub; Self-service automation portal 2. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Hardened Images as not affected.
Red Hat does not currently list a fixing RHSA for this CVE.
- < 8.0.9
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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