Vulnerability · CVE-2026-56851
Panic parsing crafted input in x/text/secure/precis in golang.org/x/text
Published Oct 7, 2026 · catalog updated Oct 20, 2026 · Panic parsing crafted input
Last checked Oct 25, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-56851. EPSS is 0.47%. Act only if a listed version of Panic parsing crafted input is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Panic parsing crafted input).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Unknown—
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.47%
- Remediation
- Not established
- Affected products
- Go golang.org/x/text
The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- Go golang.org/x/text0 → 0.41.0
How to fix CVE-2026-56851
Upgrade
CVE-2026-56851 lists a fix boundary at 0.41.0. Compare the installed build with that boundary before you change production.
Version check
Fixed in 0.41.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-56851. EPSS is 0.47%. Act only if a listed version of Panic parsing crafted input is installed.
Which versions are affected?
Compare what you have installed with 0 → 0.41.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.47%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 7, 2026 · OpenSSF OSV / OSV Scanner
Detected
The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.
Oct 20, 2026 · OpenSSF OSV / OSV Scanner
Fix available
golang.org/x/text fixed in 0.41.0
Oct 20, 2026 · OpenSSF OSV / OSV Scanner
Fix available
golang.org/x/text fixed in 0.41.0
Oct 20, 2026 · OpenSSF OSV / OSV Scanner
Updated
The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.
Sources
- CVE.orgVulnerability recordCVE-2026-56851
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-56851
30-day exploitation probability 0.47%
first.org - Go Vulnerability DatabasePackage advisoryGO-2026-6629
Panic parsing crafted input in x/text/secure/precis in golang.org/x/text
osv.dev - OpenSSF OSV / OSV ScannerPackage advisoryGO-2026-6629
Panic parsing crafted input in x/text/secure/precis in golang.org/x/text
osv.dev
References
Freshness
Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 25, 2026
- Go Vulnerability DatabaseOct 23, 2026
- CVE.orgOct 21, 2026
- OpenSSF OSV / OSV ScannerOct 20, 2026