USN-8459-1: haproxy Ubuntu

CVSS: UnknownPublished
Published 22-06-2026Last modified 29-06-2026
Open JSON

Vulnerability summary

USN-8459-1 is a vulnerability in haproxy Ubuntu with no CVSS score yet.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 2
CVE-2026-55203CVE-2026-55204

Timeline

  1. 22-06-2026
    PublishedVulnerability first disclosed.
  2. 29-06-2026
    Last modifiedVulnerability information updated.

Description

haproxy vulnerabilities It was discovered that HAProxy incorrectly handled the FCGI demultiplexer record length field. A remote attacker could possibly use this issue to cause incorrect request routing, response smuggling, or other memory safety issues. (CVE-2026-55203) It was discovered that HAProxy failed to validate the return value of the HPACK dynamic table defragmentation function when memory was exhausted. A remote attacker could possibly use this issue to cause HAProxy to crash, resulting in a denial of service. (CVE-2026-55204)

CVSS metrics

Risk metrics not yet published.

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu1 product
  • haproxy< 2.4.30-0ubuntu0.22.04.2 | < 2.8.16-0ubuntu0.24.04.3 | < 3.0.12-0ubuntu0.25.10.5 | < 3.2.9-1ubuntu2.2

1 vendor · 1 product

References

3 links