HAProxy 3.4 lifecycle

Current status

standard supportLTSlow

HAProxy 3.4 is currently in standard support.

Security: 2 tracked advisories affecting this line. Details below — lifecycle and vulnerability status are separate.

Official lifecycle source: HAProxy Homepage Branch Table

Support phase
standard support
End of life
30 Jun 2031
Latest release
3.4.0
Released
3 Jun 2026

At a glance

Version line
3.4
Initial release
3 Jun 2026
Lifecycle phase
standard support
Latest stable
3.4.0
Latest release date
3 Jun 2026
EOL
30 Jun 2031
Until EOL
~58 months
Risk
low
Releases tracked
1

Lifecycle timeline

Phases from published LifecyclePeriod records. Missing phases are not inferred.

  1. Release

    3 Jun 2026

  2. standard supportcurrent

    3 Jun 2026 → 30 Jun 2031

    Source: HAProxy Homepage Branch Table

  3. end of life

    30 Jun 2031 → —

    Source: HAProxy Homepage Branch Table

HAProxy 3.4 is currently in standard support.

Security

Advisories affecting HAProxy 3.4 (OSV.dev evidence). Known exploited status, due dates, and ransomware use from CISA KEV when matched.

Known vulnerabilities
2
Known exploited
0
Highest CVSS
  • CVE-2026-55204

    HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

    Affected:
    <=3.4.0
    Source:
    OSV source · Advisory
  • CVE-2026-55203

    HAProxy - Integer Overflow in FCGI Demux Record Length Field

    Affected:
    <=3.4.0
    Source:
    OSV source · Advisory

Latest release

Release history

1 concrete release tracked for this line.

VersionRelease dateChannelSource
3.4.03 Jun 2026stableSource

Release activity

Total releases
1
Last 30 days
0
Last 90 days
0
Most recent
3 Jun 2026

Should I use this version?

Suitable for new deployments

HAProxy 3.4 is currently supported (standard support).

Version comparison

Compact comparison against the nearest relevant release lines.

3.43.3
Statusstandard supportstandard support
Latest release3.4.03.3.0
EOLJun 2031Mar 2027
Risklowlow

Sources

Where this information comes from.

Lifecycle sources

Release sources

Data coverage

Last checked = last successful upstream check. Latest source update = when upstream content last changed.

Releases tracked
1
Lifecycle periods
2
EOL
Known
Provenance records
3
Data last checked
2 Sept 2026
Latest source update
2 Sept 2026

Other HAProxy versions