Bazel 5 End of Life Date
Bazel 5 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
Bazel 5 was released on January 19, 2022 and support ended on January 31, 2025 — a supported lifespan of 3 years, in line with the 3 years median for Bazel LTS releases. It was a long-term support (LTS) release, so it received a longer patch window than the interim releases around it. The last patch it will ever receive is 5.4.1, published April 19, 2023 — 1 year and 10 months before support ended. It has been without security patches for 1 year and 8 months. 1 newer Bazel release has shipped since.
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When Bazel 5 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Bazel 5 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Bazel 9 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.