CVE-2021-27291

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2021-27291
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-27291.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-27291
Aliases
Downstream
Related
Published
2021-03-17T13:15:15.137Z
Modified
2026-07-07T08:51:41.158156401Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                },
                {
                    "introduced": "10.0"
                },
                {
                    "last_affected": "10.0"
                }
            ],
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "source": "CPE_STRING"
        },
        {
            "extracted_events": [
                {
                    "introduced": "32"
                },
                {
                    "last_affected": "32"
                },
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                }
            ],
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "source": "CPE_STRING"
        }
    ]
}
References

Affected packages

Git / github.com/pygments/pygments

Affected ranges

Type
GIT
Repo
https://github.com/pygments/pygments
Events
Introduced
f534f990331df660f5a5ea6947943e184672ac51
Fixed
4d555d0fffc914a2a4ac9874416cdaaf8f8c9e74
Fixed
2e7e8c4a7b318f4032493773732754e418279a14
Database specific 
{
    "extracted_events": [
        {
            "introduced": "1.1"
        },
        {
            "fixed": "2.7.4"
        }
    ],
    "cpe": "cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-27291.json"