Protocol Buffers 3.25 · Version Status
Protocol Buffers 3.25 End of Life Date
Protocol Buffers 3.25 end-of-life date, support status, and CVE risk. Dates read at the vendor's own lifecycle pages (protobuf.dev); the source of each date is on the product page.
⚡
Protocol Buffers 3.25 reaches end of life on March 31, 2027. Plan your migration now — 168 days remaining.
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EOL Date
Mar 31, 2027
168 days remaining
Latest Release
3.25.9
LTS release
Release Date
Nov 1, 2023
Protocol Buffers 3.25 series
Lifecycle detail
Protocol Buffers 3.25 was released on November 1, 2023 and support is scheduled to end on March 31, 2027 — a planned supported lifespan of 3 years and 5 months. It is a long-term support (LTS) release, so it carries a longer patch window than the interim releases around it. Its most recent patch is 3.25.9, published March 25, 2026.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended Protocol Buffers 3.25 support is available
Commercial vendors offer security patches beyond EOL. Right now that coverage spans Protocol Buffers 3.21. Compare your options.
Compare Options →
All Protocol Buffers Versions
| Version | Latest | EOL Date | Status |
|---|
| 2.x |
2.6.1 |
Supported |
EOL |
| 3.0-3.24 |
3.24.4 |
Supported |
EOL |
| → 3.25 LTS |
3.25.9 |
Mar 31, 2027 |
Warning |
| 4.x |
4.36.2 |
Mar 31, 2028 |
Active |
What does Protocol Buffers 3.25 end of life mean?
When Protocol Buffers 3.25 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 Protocol Buffers 3.25 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Protocol Buffers 4.x or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Protocol Buffers 3.25 reach end of life?
Protocol Buffers 3.25 reaches end of life on March 31, 2027. That is 168 days remaining.
Is Protocol Buffers 3.25 still supported?
Protocol Buffers 3.25 is still supported but approaching end of life on March 31, 2027. Begin planning your migration now.
What should I upgrade to from Protocol Buffers 3.25?
The recommended upgrade from Protocol Buffers 3.25 is
Protocol Buffers 4.x — the latest actively supported version. Check the
Protocol Buffers full timeline for all supported versions.
What are the security risks of running Protocol Buffers 3.25 past EOL?
When Protocol Buffers 3.25 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Protocol Buffers should migrate immediately or implement compensating controls.