CVE-2026-39820
Published: May 13, 2026Last modified: May 16, 2026
Description
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| 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 |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | go | Fixed (1.25.10-r0) |
| 25 LTS | go | Fixed (1.25.10-r0) | |
| Stream | go | Fixed (1.26.3-r0) | |
| Hardened Containers | 23 LTS | go | Fixed (1.25.10-r0) |
| 25 LTS | go | Fixed (1.25.10-r0) | |
| Stream | go | Fixed (1.26.3-r0) |
References
- https://access.redhat.com/errata/RHSA-2026:33120
- https://access.redhat.com/errata/RHSA-2026:33123
- https://access.redhat.com/errata/RHSA-2026:33142
- https://access.redhat.com/errata/RHSA-2026:33150
- https://access.redhat.com/errata/RHSA-2026:33574
- https://access.redhat.com/errata/RHSA-2026:34364
- https://access.redhat.com/security/cve/CVE-2026-39820
- https://bugzilla.redhat.com/show_bug.cgi?id=2467820
- https://go.dev/cl/759940
- https://go.dev/issue/78566
- https://groups.google.com/g/golang-announce/c/qcCIEXso47M
- https://pkg.go.dev/vuln/GO-2026-4986
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39820.json