DEBIAN-CVE-2026-63435
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-63435
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63435.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-63435
- Upstream
- Published
- 2026-09-01T21:18:35Z
- Modified
- 2026-09-10T08:47:25Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
- Summary
- [none]
- Details
-
Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.q_value_decode and Mail::Utilities.b_value_decode used a single String#match and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle surrounding or subsequent text. A crafted malformed encoded-word in an address display name or local part could cross ? delimiters and make decoded From, To, or Reply-To header values differ from the raw values inspected by a human reviewer or downstream parser, enabling apparent sender or recipient spoofing, phishing, or authorization-check bypass. This issue is fixed in version 2.9.1.
- References
Affected packages
Debian:12 / ruby-mail
Package
- Name
- ruby-mail
- Purl
- pkg:deb/debian/ruby-mail?arch=source&distro=bookworm
Debian:13 / ruby-mail
Package
- Name
- ruby-mail
- Purl
- pkg:deb/debian/ruby-mail?arch=source&distro=trixie
Debian:14 / ruby-mail
Package
- Name
- ruby-mail
- Purl
- pkg:deb/debian/ruby-mail?arch=source&distro=forky