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TI-2026-21084 Aliases CVE-2026-26080GHSA-fhrv-3q89-79q6

HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash…

Priority LOW 18CWE-252Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00546 46th percentileScored 2026-11-07
Fix Fixed HAProxy (HAProxy): 3.2.12, 3.3.3Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HAProxyHAProxy3.2 to before 3.2.12; 3.3 to before 3.3.33.2.12, 3.3.3Patch availableCNA
  • HAProxy VendorHAProxy Affected 3.2 to before 3.2.12; 3.3 to before 3.3.3 Fixed in 3.2.12, 3.3.3 Patch available CNA

CPE configurations NVD · 22

CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*3.2 to before 3.2.12; 3.3 to before 3.3.3VulnerableHAProxy
cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:*17.0.0 to before 17.0.18; 17.5.0 to before 17.5.16VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.334:*:*:*:*:*:*3.2r1 1.0.0-353.334VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.336:*:*:*:*:*:*3.2r1 1.0.0-353.336VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.347:*:*:*:*:*:*3.2r1 1.0.0-353.347VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.355:*:*:*:*:*:*3.2r1 1.0.0-353.355VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.376:*:*:*:*:*:*3.2r1 1.0.0-353.376VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.385:*:*:*:*:*:*3.2r1 1.0.0-353.385VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.398:*:*:*:*:*:*3.2r1 1.0.0-353.398VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-354.402:*:*:*:*:*:*3.2r1 1.0.0-354.402VulnerableHAProxy
  • cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* Versions 3.2 to before 3.2.12; 3.3 to before 3.3.3 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:* Versions 17.0.0 to before 17.0.18; 17.5.0 to before 17.5.16 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.334:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.334 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.336:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.336 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.347:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.347 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.355:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.355 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.376:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.376 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.385:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.385 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.398:*:*:*:*:*:* Versions 3.2r1 1.0.0-353.398 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-354.402:*:*:*:*:*:* Versions 3.2r1 1.0.0-354.402 Vulnerable ·HAProxy
Show 12 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-354.439:*:*:*:*:*:*3.2r1 1.0.0-354.439VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-358.439:*:*:*:*:*:*3.2r1 1.0.0-358.439VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-359.440:*:*:*:*:*:*3.2r1 1.0.0-359.440VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-360.460:*:*:*:*:*:*3.2r1 1.0.0-360.460VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-362.473:*:*:*:*:*:*3.2r1 1.0.0-362.473VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.476:*:*:*:*:*:*3.2r1 1.0.0-363.476VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.478:*:*:*:*:*:*3.2r1 1.0.0-363.478VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.498:*:*:*:*:*:*3.2r1 1.0.0-363.498VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.511:*:*:*:*:*:*3.2r1 1.0.0-363.511VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.529:*:*:*:*:*:*3.2r1 1.0.0-365.529VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.531:*:*:*:*:*:*3.2r1 1.0.0-365.531VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.545:*:*:*:*:*:*3.2r1 1.0.0-365.545VulnerableHAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-354.439:*:*:*:*:*:* Versions 3.2r1 1.0.0-354.439 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-358.439:*:*:*:*:*:* Versions 3.2r1 1.0.0-358.439 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-359.440:*:*:*:*:*:* Versions 3.2r1 1.0.0-359.440 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-360.460:*:*:*:*:*:* Versions 3.2r1 1.0.0-360.460 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-362.473:*:*:*:*:*:* Versions 3.2r1 1.0.0-362.473 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.476:*:*:*:*:*:* Versions 3.2r1 1.0.0-363.476 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.478:*:*:*:*:*:* Versions 3.2r1 1.0.0-363.478 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.498:*:*:*:*:*:* Versions 3.2r1 1.0.0-363.498 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.511:*:*:*:*:*:* Versions 3.2r1 1.0.0-363.511 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.529:*:*:*:*:*:* Versions 3.2r1 1.0.0-365.529 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.531:*:*:*:*:*:* Versions 3.2r1 1.0.0-365.531 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.545:*:*:*:*:*:* Versions 3.2r1 1.0.0-365.545 Vulnerable ·HAProxy

Remediation

  • Fix · CNA HAProxy (HAProxy) Fixed in 3.2.12, 3.3.3

Red Hat 1 advisory

  • RHSA-2026:40938 Released 2026-07-16 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images haproxy-3.0.25-0.1.1.hum1@aarch64, haproxy-3.0.25-0.1.1.hum1@src, haproxy-3.0.25-0.1.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:40938
Not affected: 11 products
  • Red Hat Ceph Storage 5
  • Red Hat Ceph Storage 6
  • Red Hat Ceph Storage 7
  • Red Hat Ceph Storage 8
  • Red Hat Ceph Storage 9
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26080
  2. 2026-10-03 Alias added: GHSA-fhrv-3q89-79q6
  3. 2026-11-06 Affected versions changed · Red Hat

References

Patch 1

Other 1

  • TI-2026-21085 HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the… CVSS 3.1MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences