Vulnerability · Published Oct 7, 2026 · Assigned by Go
CVE-2026-56851Panic parsing crafted input in x/text/secure/precis in golang.org/x/text
High 7.5
In plain English
A high-severity out-of-bounds write in golang.org/x/text/secure/precis from golang.org/x/text. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 59.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-golang-x-text | no fix listed | DEBIAN-CVE-2026-56851 |
| Debian:13 | golang-golang-x-text | no fix listed | DEBIAN-CVE-2026-56851 |
| Debian:14 | golang-golang-x-text | 0.41.0-1 | DEBIAN-CVE-2026-56851 |
| Go | golang.org/x/text | 0.41.0 | GO-2026-6629 |
| Ubuntu:22.04:LTS | golang-golang-x-text | no fix listed | UBUNTU-CVE-2026-56851 |
| Ubuntu:24.04:LTS | golang-golang-x-text | no fix listed | UBUNTU-CVE-2026-56851 |
| Ubuntu:26.04:LTS | golang-golang-x-text | no fix listed | UBUNTU-CVE-2026-56851 |
| Ubuntu:26.10 | golang-golang-x-text | no fix listed | UBUNTU-CVE-2026-56851 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| golang.org/x/text | golang.org/x/text/secure/precis | 0 – before 0.41.0 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H