fix(deps): pin urllib3 to 2.7.0 for CVE-2026-9375#4193
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fix(deps): pin urllib3 to 2.7.0 for CVE-2026-9375#4193Jan-Kazlouski-elastic wants to merge 1 commit into
Jan-Kazlouski-elastic wants to merge 1 commit into
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urllib3 <2.7.0 (shipped transitively via requests) can bypass the streaming decompression-bomb safeguards (drain_conn after a partial read, and a second Brotli read/stream), enabling a malicious HTTP server to trigger an OOM DoS. Pin urllib3 directly to the fixed 2.7.0 release; no parent dependency forces a fixed version. Closes elastic/security#12535 Co-authored-by: Cursor <cursoragent@cursor.com>
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Closes https://github.com/elastic/security/issues/12535
Pins
urllib3to the fixed2.7.0release to address CVE-2026-9375 (High, CWE-400), a decompression-bomb bypass in urllib3's streaming API.Assessment: Affected
urllib3ships transitively (viarequests==2.32.4, and alsobotocore/elastic-transport). None of these parents floorurllib3at>=2.7.0— current and latest releases all declare a broadurllib3<3range with a low lower bound — so the resolver could (and in the customer SBOM for 9.4.0/9.4.2 did) select the vulnerable2.6.3. A direct pin is the only deterministic remedy.The 2.7.0 fix closes two streaming decompression-bomb bypass paths. The Brotli-specific path is not reachable (Brotli is not an installed dependency), but the
HTTPResponse.drain_conn()-after-partial-read path is not Brotli-specific and is exercised byrequests' normal connection reuse on standard gzip/deflate responses. A malicious or compromised configured source could therefore trigger an out-of-memory denial of service. Impact is availability-only (CVSS 3.0 7.5,AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H); no confidentiality/integrity impact. Practical exposure is reduced because connectors only talks to operator-configured sources, not a public multi-tenant endpoint.Note: no
urllib32.6.4 exists on PyPI (versions jump 2.6.3 → 2.7.0); NVD confirms "affected < 2.7.0", so 2.7.0 is the fixed release.Scanner A/B (
CVE-2026-9375)The scanners track the duplicate OSV/GitHub record for the same decompression-bomb fix (
CVE-2026-44432/PYSEC-2026-142/GHSA-mf9v-mfxr-j63j) rather than the literalCVE-2026-9375; both are fixed in 2.7.0.(Snyk's DB does not carry this urllib3 advisory, so it neither reported before nor after — inconclusive.)
Checklists
Pre-Review Checklist
make clean install autoformat lint test PYTHON=python3.11, all tests pass)Changes Requiring Extra Attention
Release Note
Bump urllib3 to 2.7.0 to address CVE-2026-9375.
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