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CVE-2026-34975 - Vulnerability Analysis

HighCVSS: 8.5

Last Updated: April 6, 2026

Plunk - CRLF Injection

Published: April 6, 2026Updated: April 6, 2026Remote Exploitable

Overview

Plunk < 0.8.0 contains a CRLF injection caused by unsanitized user input in email header fields in SESService.ts, letting authenticated API users inject arbitrary email headers, exploit requires authentication.

Severity & Score

Severity: High

CVSS Score: 8.5

Impact

Authenticated users can inject arbitrary email headers, enabling silent forwarding, reply redirection, or sender spoofing.

Mitigation

Update to version 0.8.0 or later.

References

https://github.com/useplunk/plunk/security/advisories/GHSA-2mvm-rg5v-7hfq

Related Resources

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Details

CVE ID: CVE-2026-34975
Severity: High
CVSS Score: 8.5
Type: crlf_injection
Status: new

CWE

CWE-93

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N