CVE-2026-4645
Publication date 23 March 2026
Last updated 25 March 2026
Ubuntu priority
Description
A flaw was found in the `github.com/antchfx/xpath` component. A remote attacker could exploit this vulnerability by submitting crafted Boolean XPath expressions that evaluate to true. This can cause an infinite loop in the `logicalQuery.Select` function, leading to 100% CPU utilization and a Denial of Service (DoS) condition for the affected system.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| golang-github-antchfx-xpath | 25.10 questing |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| golang-golang-x-vuln | 25.10 questing |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-4645
- https://access.redhat.com/security/cve/CVE-2026-4645
- https://bugzilla.redhat.com/show_bug.cgi?id=2450214
- https://github.com/antchfx/xpath/commit/afd4762cc342af56345a3fb4002a59281fcab494
- https://github.com/antchfx/xpath/issues/121
- https://github.com/golang/vulndb/issues/4526