Security · High impactFan score 23 · Tier C2 sources
zlib 1.4 released with security fixes
The Brief
- zlib 1.4 was released on 2026-11-05 with security fixes.
- Phoronix reports that the release includes more than a dozen security fixes.
- The sources do not name individual CVEs; the full list is linked from the oss-sec post.
Why it matters
zlib is a widely used compression library, so applications and systems that bundle or link it may need to update to receive these fixes.
Who’s affected
- Teams and systems using zlib
What to do
- Upgrade zlib to version 1.4 or later.
- zlib 1.4
- #zlib
- #security
- #compression
- #open-source
- #vulnerability-fixes
Posted by Alan Coopersmith on Nov 05 https://github.com/madler/zlib/releases/tag/v1.4 lists these security fixes:
Timeline
zlib 1.4 released with security fixes
Phoronix
Zlib 1.4 Released With More Than One Dozen Security Fixes
Open Source Security
zlib 1.4 released with security fixes