Upstream information
Description
An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be used for request smuggling. The earliest affected version is 2.6.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (MITRE) | SUSE |
|---|---|---|
| Base Score | 4 | 4 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Changed | Changed |
| Confidentiality Impact | None | None |
| Integrity Impact | Low | Low |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 6.3 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Attack Requirements | Present |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | None |
| Vulnerable System Integrity Impact | None |
| Vulnerable System Availability Impact | None |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | Low |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP7 | haproxy | Affected |
| SUSE Linux Enterprise High Availability Extension 16.0 | haproxy | Affected |
| SUSE Linux Enterprise Micro 5.3 | haproxy | Not affected |
| SUSE Linux Enterprise Micro 5.4 | haproxy | Not affected |
| SUSE Linux Enterprise Micro 5.5 | haproxy | Not affected |
| SUSE Linux Enterprise Server 16.1 | haproxy | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | haproxy | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | haproxy | Affected |
| SUSE Linux Micro 6.0 | haproxy | Affected |
| SUSE Linux Micro 6.1 | haproxy | Affected |
| SUSE Linux Micro 6.2 | haproxy | Affected |
| openSUSE Leap 15.6 | haproxy | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 12 SP5 | haproxy | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | haproxy | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | haproxy | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | haproxy | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP6 | haproxy | Affected |
| openSUSE Leap 15.4 | haproxy | Not affected |
| openSUSE Leap 15.5 | haproxy | Not affected |
| openSUSE Leap Micro 5.3 | haproxy | Not affected |
| openSUSE Leap Micro 5.4 | haproxy | Not affected |
| openSUSE Leap Micro 5.5 | haproxy | Not affected |
SUSE Timeline for this CVE
CVE page created: Mon Apr 13 20:10:19 2026CVE page last modified: Tue Apr 14 17:52:10 2026