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    2 vulnerabilities by mikel

    CVE-2026-63435 (GCVE-0-2026-63435)

    Vulnerability from nvd – Published: 2026-09-01 20:09 – Updated: 2026-09-02 15:44
    VLAI
    Title
    Mail: Email address spoofing via malformed RFC 2047 encoded-words
    Summary
    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.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-02 15:44 UTC
    CWE
    • CWE-436 - Interpretation Conflict
    Assigner
    References
    Impacted products
    Vendor Product Version
    mikel mail Affected: < 2.9.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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                "id": "CVE-2026-63435",
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                "timestamp": "2026-09-02T15:44:44.094469Z",
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          "dateUpdated": "2026-09-02T15:44:56.368Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "mail",
          "vendor": "mikel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.9.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
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            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
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          ],
          "url": "https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q"
        },
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          "name": "https://github.com/mikel/mail/pull/1664",
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      "title": "Mail: Email address spoofing via malformed RFC 2047 encoded-words"
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    "datePublished": "2026-09-01T20:09:20.820Z",
    "dateReserved": "2026-07-16T19:35:57.767Z",
    "dateUpdated": "2026-09-02T15:44:56.368Z",
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    CVE-2026-63435 (GCVE-0-2026-63435)

    Vulnerability from cvelistv5 – Published: 2026-09-01 20:09 – Updated: 2026-09-02 15:44
    VLAI
    Title
    Mail: Email address spoofing via malformed RFC 2047 encoded-words
    Summary
    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.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-02 15:44 UTC
    CWE
    • CWE-436 - Interpretation Conflict
    Assigner
    References
    Impacted products
    Vendor Product Version
    mikel mail Affected: < 2.9.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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                "timestamp": "2026-09-02T15:44:44.094469Z",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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