CVE-2026-126192

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-126192
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126192.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-126192
Aliases
Downstream
CGA (8)
Published
2026-11-12T17:09:14Z
Modified
2026-11-13T10:31:02Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Soup Sieve: General sibling combinator inside :has() matches untrusted HTML in quadratic time
Details

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.10, matching a developer-authored selector that places the general sibling combinator inside :has() repeatedly scans each candidate element's following siblings when the right-hand side is absent, producing quadratic work on attacker-controlled HTML. Applications that evaluate a fixed selector such as div:has(a ~ b) over untrusted markup can have a worker occupied for minutes by a small document, while the adjacent sibling form and trusted-only document processing are not affected in the same way. This issue is fixed in version 2.10.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400",
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126192.json"
}
References

Affected packages

Git / github.com/facelessuser/soupsieve

Affected ranges

Type
GIT
Repo
https://github.com/facelessuser/soupsieve
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fc195cd50a6b9a00a86531ab6b9a2e59bd26f608
Fixed
ffb88cca745c591224f74a8e86414a85e8f35fc0
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.10"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "ffb88cca745c591224f74a8e86414a85e8f35fc0"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "2.10",
            "range": [
                {
                    "fixed": "fc195cd50a6b9a00a86531ab6b9a2e59bd26f608"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

0.*
0.4.0
0.5.0
0.5.1
0.5.2
0.5.3
0.6.0
1.*
1.0.0
1.0.0b1
1.0.0b2
1.0.1
1.0.2
1.1.0
1.2.0
1.2.1
1.3.0
1.3.1
1.4.0
1.5.0
1.6.0
1.6.1
1.7.0
1.7.1
1.7.2
1.7.3
1.8.0
1.9.0
1.9.1
1.9.2
1.9.3
1.9.4
2.*
2.0.0
2.0.1
2.1.0
2.2
2.2.1
2.3
2.3.1
2.3.2
2.3.2.post1
2.4
2.4.1
2.5
2.6
2.7
2.8
2.8.1
2.8.2
2.8.3
2.8.4
2.9
2.9.1
2.9.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126192.json"