HAProxy 3.x — End of Life
EOL soon High riskHAProxy 3.x is partially supported: only 3.4, 3.3, 3.2, 3.0 still receive security fixes, the longest-lived (3.4) until Apr 1, 2031, in 1621 days. The most recent release in this series is 3.4.7. 6 CVEs are tracked for this series. 4 of them were published after the end of life of the affected cycle and will not get an official patch.
HAProxy 3.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status | Alert me |
|---|---|---|---|---|---|---|
| 3.4LTS | Jun 3, 2026 | — | Apr 1, 2031 | 3.4.7 | Active | |
| 3.3 | Nov 26, 2025 | — | Jan 1, 2027 | 3.3.17 | EOL soon | |
| 3.2LTS | May 28, 2025 | — | Apr 1, 2030 | 3.2.26 | Active | |
| 3.1 | Nov 26, 2024 | — | Jan 1, 2026 | 3.1.17 | EOL | |
| 3.0LTS | May 29, 2024 | — | Apr 1, 2029 | 3.0.30 | Active |
CVEs affecting HAProxy 3.x (23)
| CVE | Severity | CVSS | EPSS | KEV | Cycle | Description | Published |
|---|---|---|---|---|---|---|---|
| CVE-2026-26081 | MEDIUM | 4.8 | 0.47% | — | 3.2 | HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise… | Jul 20, 2026 |
| CVE-2026-26081 | MEDIUM | 4.8 | 0.47% | — | 3.1 | HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise… | Jul 20, 2026 |
| CVE-2026-26081 | MEDIUM | 4.8 | 0.47% | — | 3.3 | HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise… | Jul 20, 2026 |
| CVE-2026-26081 | MEDIUM | 4.8 | 0.47% | — | 3.0 | HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise… | Jul 20, 2026 |
| CVE-2026-26080 | LOW | 3.7 | 0.54% | — | 3.2 | HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAPro… | Jul 20, 2026 |
| CVE-2026-26080 | LOW | 3.7 | 0.54% | — | 3.3 | HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAPro… | Jul 20, 2026 |
| CVE-2026-55204 | HIGH | 7.5 | 0.48% | — | 3.2 | HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert()… | Jun 18, 2026 |
| CVE-2026-55204 | HIGH | 7.5 | 0.48% | — | 3.1 | HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert()… | Jun 18, 2026 |
| CVE-2026-55204 | HIGH | 7.5 | 0.48% | — | 3.3 | HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert()… | Jun 18, 2026 |
| CVE-2026-55204 | HIGH | 7.5 | 0.48% | — | 3.0 | HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert()… | Jun 18, 2026 |
| CVE-2026-55204 | HIGH | 7.5 | 0.48% | — | 3.4 | HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert()… | Jun 18, 2026 |
| CVE-2026-55203 | HIGH | 7.5 | 0.33% | — | 3.0 | HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's … | Jun 18, 2026 |
| CVE-2026-55203 | HIGH | 7.5 | 0.33% | — | 3.2 | HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's … | Jun 18, 2026 |
| CVE-2026-55203 | HIGH | 7.5 | 0.33% | — | 3.1 | HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's … | Jun 18, 2026 |
| CVE-2026-55203 | HIGH | 7.5 | 0.33% | — | 3.3 | HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's … | Jun 18, 2026 |
| CVE-2026-55203 | HIGH | 7.5 | 0.33% | — | 3.4 | HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's … | Jun 18, 2026 |
| CVE-2026-33555 | MEDIUM | 4.0 | 0.57% | — | 3.3 | An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches … | Apr 13, 2026 |
| CVE-2026-33555 | MEDIUM | 4.0 | 0.57% | — | 3.2 | An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches … | Apr 13, 2026 |
| CVE-2026-33555 | MEDIUM | 4.0 | 0.57% | — | 3.1 | An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches … | Apr 13, 2026 |
| CVE-2026-33555 | MEDIUM | 4.0 | 0.57% | — | 3.0 | An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches … | Apr 13, 2026 |
| CVE-2025-11230 | HIGH | 7.5 | — | — | 3.0 | Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially … | Nov 19, 2025 |
| CVE-2025-11230 | HIGH | 7.5 | — | — | 3.1 | Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially … | Nov 19, 2025 |
| CVE-2025-11230 | HIGH | 7.5 | — | — | 3.2 | Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially … | Nov 19, 2025 |
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[](https://eolcanary.com/explore/haproxy/3)Frequently asked questions
Is HAProxy 3 end of life?
Partially. 1 of the 5 HAProxy 3.x releases have reached end of life. Still supported: 3.4, 3.3, 3.2, 3.0 (until April 1, 2031 at the latest).
What CVEs affect HAProxy 3?
There are 6 CVEs tracked for HAProxy 3.x. See the full list above with CVSS and EPSS scores.
What is the latest HAProxy 3 version?
The latest HAProxy 3.x patch release is 3.4.7, released on October 14, 2026. Always run the latest patch to benefit from all security fixes.
When was HAProxy 3 first released?
HAProxy 3.0 was released on May 29, 2024. See the full version timeline in the table above.
Is it safe to run HAProxy 3 in production?
Only on a supported release (3.4, 3.3, 3.2, 3.0). Support for HAProxy 3.4 ends on April 1, 2031. Make sure you run the latest patch (3.4.7) to have all security fixes applied.
Data sourced from endoflife.date · CVE data from NVD · EPSS from FIRST.org · KEV from CISA