DEBIAN-CVE-2026-116266

MIME::Head versions from 5.518 before 5.521 for Perl decode a partly encoded multipart boundary without flagging the parse as ambiguous. The multipartboundary method decodes RFC 2047 encoded words anywhere in the boundary, but the ambiguity check only fires when the whole value is one encoded wor...

PT-2026-129080

Name of the Vulnerable Software and Affected Versions MIME::Head versions 5.518 through 5.520 Description The multipart boundary method decodes RFC 2047 encoded words within a boundary but fails to flag the parse as ambiguous unless the entire value consists of a single encoded word. This allows ...

GHSA-F2HQ-32VH-53CC postal-mime: Quadratic CPU consumption when decoding a header of many joinable RFC 2047 base64 encoded words

Impact Decoding a header that holds a long run of joinable RFC 2047 base64 encoded words, such as =?utf-8?B?QUJD?= repeated tens of thousands of times in a Subject, From, To, a filename or a description, took time quadratic in the number of words. The join check ran a regex over the text joined s...

npm: postal-mime: Quadratic CPU consumption when decoding a header of many joinable RFC 2047 base64 encoded words

npm: postal-mime: Quadratic CPU consumption when decoding a header of many joinable RFC 2047 base64 encoded words vulnerability discovered by ? in WordPress npm postal-mime versions = 3.0.0, 4.0.8...

postal-mime: Quadratic CPU consumption when decoding a header of many joinable RFC 2047 base64 encoded words

Impact Decoding a header that holds a long run of joinable RFC 2047 base64 encoded words, such as =?utf-8?B?QUJD?= repeated tens of thousands of times in a Subject, From, To, a filename or a description, took time quadratic in the number of words. The join check ran a regex over the text joined s...

PT-2026-135858

Impact Decoding a header that holds a long run of joinable RFC 2047 base64 encoded words, such as =?utf-8?B?QUJD?= repeated tens of thousands of times in a Subject, From, To, a filename or a description, took time quadratic in the number of words. The join check ran a regex over the text joined s...

CVE-2026-63435

A flaw was found in Mail, an internet library for Ruby. The library's decoding of RFC 2047 encoded-words in email headers was vulnerable to an overly greedy charset capture. A remote attacker could exploit this by crafting a malformed encoded-word in an address display name or local part. This...

OESA-2026-4105 rubygem-mail security update

A really Ruby Mail handler. Security Fixes: Affected versions of this package are vulnerable to Improper Validation of Syntactic Correctness of Input through qvaluedecode and bvaluedecode in lib/mail/utilities.rb. An attacker can make a display name or local part decode to a different address tha...

Linux Distros Unpatched Vulnerability : CVE-2026-63435

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and...

EUVD-2026-69609

Mail: Email address spoofing via malformed RFC 2047 encoded-words...

Mail: Email address spoofing via malformed RFC 2047 encoded-words

Summary Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode decoded only the first RFC 2047 encoded-word in a string and used an overly greedy pattern to match the charset token. A crafted, malformed encoded-word embedded in an address display name or local part could cause the decoded...

GHSA-MVXR-6M87-MV2Q Mail: Email address spoofing via malformed RFC 2047 encoded-words

Summary Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode decoded only the first RFC 2047 encoded-word in a string and used an overly greedy pattern to match the charset token. A crafted, malformed encoded-word embedded in an address display name or local part could cause the decoded...

SUSE CVE-2026-63435

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...

CVE-2026-63435

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...

DEBIAN-CVE-2026-63435

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...

CVE-2026-63435 Mail: Email address spoofing via malformed RFC 2047 encoded-words

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...

CVE-2026-63435

Mail (Ruby gem for email generation, parsing, and sending) is vulnerable to email address spoofing via malformed RFC 2047 encoded-words prior to version 2.9.1 . The root cause lies in Mail::Utilities.q_value_decode and Mail::Utilities.b_value_decode in lib/mail/utilities.rb, which used a single S...

CVE-2026-63435

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...

CVE-2026-63435 Mail: Email address spoofing via malformed RFC 2047 encoded-words

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...

CVE-2026-63435 Mail: Email address spoofing via malformed RFC 2047 encoded-words

Mail is an internet library for Ruby designed to handle email generation, parsing, and sending. Prior to 2.9.1, Mail::Utilities.qvaluedecode and Mail::Utilities.bvaluedecode used a single Stringmatch and an overly greedy charset capture to decode only the first RFC 2047 encoded-word and mishandle...