High [CVE-2026-21441] urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API)
This high-severity Red Hat Linux advisory covers CVE-2026-21441 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.2 Advanced Update Support.
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Summary
urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API). Red Hat rates this important (CVSS 7.5).
Weakness: CWE-409. Affected package(s): rhacm2/submariner-globalnet-rhel9:1774550347, oadp/oadp-velero-rhel9:1770421082, rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9:1771502845, rhoai/odh-pipeline-runtime-minimal-cpu-py312-rhel9:1770103255, python3.12-urllib3, rhoai/odh-workbench-jupyter-tensorflow-cuda-py312-rhel9:1771502910.
Resolved in Red Hat advisory RHSA-2026:2456 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 71 more.
- rhacm2/submariner-globalnet-rhel9:1774550347
- oadp/oadp-velero-rhel9:1770421082
- rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9:1771502845
- rhoai/odh-pipeline-runtime-minimal-cpu-py312-rhel9:1770103255
- python3.12-urllib3-0:1.26.19-1.el9_7.1
- rhoai/odh-workbench-jupyter-tensorflow-cuda-py312-rhel9:1771502910
- rhacm2/submariner-route-agent-rhel9:1774550357
- fence-agents-0:4.2.1-65.el8_4.25
- rhoai/odh-llm-d-routing-sidecar-rhel9:1778262829
- rhoai/odh-training-cuda124-torch25-py311-rhel9:1770053626
- rhoai/odh-kserve-storage-initializer-rhel9:1771840993
- rhoai/odh-built-in-detector-rhel9:1778262952
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:2456
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:2456 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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