{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-27291",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
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                    "vendor_name": "n/a"
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    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
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        ]
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    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "name": "https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce",
                "url": "https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce"
            },
            {
                "refsource": "MISC",
                "name": "https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14",
                "url": "https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210319 [SECURITY] [DLA 2600-1] pygments security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4878",
                "url": "https://www.debian.org/security/2021/dsa-4878"
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            {
                "refsource": "DEBIAN",
                "name": "DSA-4889",
                "url": "https://www.debian.org/security/2021/dsa-4889"
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            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210505 [SECURITY] [DLA 2648-1] mediawiki security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-166dfc62b2",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-3f975f68c8",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210506 [SECURITY] [DLA 2648-2] mediawiki regression update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html"
            }
        ]
    }
}