{"action":"Upgrade urllib3 to 2.6.3 or later.","affected":[{"fixed":"2.6.3","introduced":"1.22"}],"component":"urllib3","cve_ids":["CVE-2026-21441"],"ecosystem":"PyPI","epss":0.02922,"exploited":false,"fixed_versions":["2.6.3"],"ghsa_id":"GHSA-38jv-5279-wg99","id":"tcs_01M5KEVBCP7W4M88Q2H0BGTE03","modified_at":"2026-09-10T03:50:32.562010895Z","published_at":"2026-01-07T19:18:14Z","references":["https://osv.dev/vulnerability/GHSA-38jv-5279-wg99","https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99","https://nvd.nist.gov/vuln/detail/CVE-2026-21441","https://github.com/urllib3/urllib3/commit/8864ac407bba8607950025e0979c4c69bc7abc7b","https://github.com/urllib3/urllib3","https://lists.debian.org/debian-lts-announce/2026/01/msg00017.html"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-38jv-5279-wg99","url":"https://osv.dev/vulnerability/GHSA-38jv-5279-wg99"}],"summary":"Decompression-bomb safeguards bypassed when following HTTP redirects (streaming API)"}