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        "state": "PUBLISHED",
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        "dateReserved": "2026-09-21T01:48:54.590Z",
        "datePublished": "2026-09-21T14:17:16.053Z",
        "dateUpdated": "2026-10-21T14:01:53.606Z"
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            "title": "Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)",
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                    "value": "A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening."
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            "references": [
                {
                    "url": "https://access.redhat.com/errata/RHSA-2026:85959",
                    "name": "RHSA-2026:85959",
                    "tags": [
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                        "x_refsource_REDHAT"
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                    "url": "https://access.redhat.com/errata/RHSA-2026:86981",
                    "name": "RHSA-2026:86981",
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                },
                {
                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531984"
                },
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                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2537395",
                    "name": "RHBZ#2537395",
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                {
                    "url": "https://gitlab.com/fetchmail/fetchmail/-/commit/cb5be5c38471eec19e519ace0bc569176317ea92"
                },
                {
                    "url": "https://www.fetchmail.info/fetchmail-SA-2026-01.txt"
                },
                {
                    "url": "https://www.openwall.com/lists/oss-security/2026/06/27/8"
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            ],
            "datePublic": "2026-06-27T00:00:00.000Z",
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                        {
                            "cweId": "CWE-121",
                            "description": "Stack-based Buffer Overflow",
                            "lang": "en",
                            "type": "CWE"
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                    ]
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            ],
            "x_redhatCweChain": "CWE-121: Stack-based Buffer Overflow",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "Rebuild fetchmail without --enable-NTLM (omit NTLM at configure time). Confirm with `fetchmail -V` that the build does not list +NTLM."
                }
            ],
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                {
                    "lang": "en",
                    "time": "2026-09-17T00:00:00.000Z",
                    "value": "Reported to Red Hat."
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                    "lang": "en",
                    "time": "2026-06-27T00:00:00.000Z",
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            "credits": [
                {
                    "lang": "en",
                    "value": "Upstream acknowledges Tristan Madani as the original reporter."
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                                "timestamp": "2026-09-22T03:55:50.026928Z",
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