CVE-2026-49476Medium· 5.9▾ SunlitA flaw was found in soupsieve, a CSS selector library used with Beautiful Soup 4. This vulnerability allows a remote attacker to cause a denial of service (DoS) by supplying a specially crafted CSS selector string. The parser allocates unb…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 32.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.5%
0.5% → 0.6%
7.5 → 5.9
high → medium
Last analysed / modified upstream
A flaw was found in soupsieve, a CSS selector library used with Beautiful Soup 4. This vulnerability allows a remote attacker to cause a denial of service (DoS) by supplying a specially crafted CSS selector string. The parser allocates unbounded memory when compiling large, comma-separated selector lists, leading to excessive memory consumption and system instability.
python-soupsieve: Soupsieve: Denial of Service via crafted CSS selector string — rated Important by Red Hat. Released 2026-07-14, updated 2026-10-15.
Affected:
Fixed:
No fix planned:
Not affected:
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:34119 For Red Hat OpenShift AI 3.4.4 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update:
https://docs.redhat.com/en/documentation/red_hat_openshift_ai/ https://access.redhat.com/errata/RHSA-2026:60520
Workarounds / mitigations:
Affected packages:
soupsieve < 2.8.4Patched in:
soupsieve 2.8.4Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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