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CVE-2026-86000 Soup Sieve: Polynomial-time ReDoS (O(n²)) in the `IDENTIFIER` / `VALUE` selector sub-patterns

🗓️ 17 Sep 2026 15:21:57Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 49 Views

Polynomial-time ReDoS in Soup Sieve before 2.9 via crafted selector matching css_parser.py.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
Soup Sieve CSS Selector XSS
22 Sep 202600:00
–bdu_fstec
cgr
Chainguard
CVE-2026-86000 vulnerabilities
19 Sep 202602:54
–cgr
circl
Circl
CVE-2026-86000
17 Sep 202622:35
–circl
cve
CVE
CVE-2026-86000
17 Sep 202615:21
–cve
debiancve
Debian CVE
CVE-2026-86000
17 Sep 202615:21
–debiancve
euvd
EUVD
EUVD-2026-81689
17 Sep 202615:21
–euvd
github
Github Security Blog
Soup Sieve: Polynomial-time ReDoS (O(n²)) in the `IDENTIFIER` / `VALUE` selector sub-patterns
17 Sep 202620:32
–github
mend
Mend
CVE-2026-86000
17 Sep 202615:21
–mend
nvd
NVD
CVE-2026-86000
17 Sep 202616:18
–nvd
nessus
Tenable Nessus
openSUSE 16 Security Update : python-soupsieve (openSUSE-SU-2026:22149-1)
23 Oct 202600:00
–nessus
Rows per page
[
  {
    "vendor": "facelessuser",
    "product": "soupsieve",
    "versions": [
      {
        "version": "< 2.9",
        "status": "affected"
      }
    ]
  }
]

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17 Sep 2026 15:21Current
CVSS 3.15.3
EPSS0.00609
SSVC
49