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Fencer Vulns
high 7.5

CVE-2026-56851 json

Panic parsing crafted input in x/text/secure/precis in golang.org/x/text

published 2026-10-07 33 d ago modified 2026-10-20 20 d ago also GO-2026-6629 , EUVD-2026-94532

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.

Patch / fix

  • go golang.org/x/text 0.41.0
  • golang.org/x/text golang.org/x/text/secure/precis 0.41.0
  • golang-golang-x-text Debian 14 0.41.0-1

debian advisories DEBIAN-CVE-2026-56851

  • fulcio hummingbird 1 1.9.0-0.1.hum1
  • caddy hummingbird 1 2.11.7-0.1.hum1
  • opentelemetry-collector hummingbird 1 0.162.0-0.1.hum1
  • opentelemetry-collector-k8s hummingbird 1 0.162.0-0.1.hum1
  • distribution hummingbird 1 3.1.2-0.1.hum1
  • golang1.27 hummingbird 1 1.27.1-2.hum1
  • golang1.27-bin hummingbird 1 1.27.1-2.hum1
  • golang1.27-src hummingbird 1 1.27.1-2.hum1

red hat advisories RHSA-2026:76606RHSA-2026:75151RHSA-2026:73524RHSA-2026:73522RHSA-2026:73401RHSA-2026:70700

  • keda Azure Linux 3.0 2.14.1-19

azure linux advisories AZL-107610

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-56851 updated cvss 7.5

golang.org/x/text: golang.org/x/text: Denial of Service via out-of-bounds slice error in Nickname profile

  • Red Hat Hardened Images golang1.25 1.25.14-0.1.hum1, prometheus3.5 3.5.5-0.8.hum1, opentofu1.11 1.11.14-0.1.hum1
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, +18 more
    affected: no fix available
  • Red Hat Hardened Images etcd 3.7.2-0.1.hum1, k6v2 2.3.0-0.1.hum1, podman 6.1.3-1.hum1, helm4 4.3.0-0.2.hum1, rekor 1.5.4-0.1.hum1, buildah 1.45.1-1.hum1, +34 more
    fixed: vendor fix RHSA-2026:70670
  • Red Hat OpenShift Builds 1.8.3 openshift-builds/openshift-builds-shared-resource-rhel9 1792680568, openshift-builds/openshift-builds-shared-resource-rhel9 1792837466, openshift-builds/openshift-builds-shared-resource-webhook-rhel9 1792680570, openshift-builds/openshift-builds-shared-resource-webhook-rhel9 1792838794
    fixed: fixed in 1.8.3 RHSA-2026:89031
  • Red Hat OpenShift Builds 1.9.2 openshift-builds/openshift-builds-shared-resource-rhel10 1792680549, openshift-builds/openshift-builds-shared-resource-rhel10 1792857112, openshift-builds/openshift-builds-shared-resource-webhook-rhel10 1792680546, openshift-builds/openshift-builds-shared-resource-webhook-rhel10 1792840655
    fixed: fixed in 1.9.2 RHSA-2026:89041
  • Red Hat Hardened Images dex 2.45.1-1.hum1, yq 4.53.3-2.1.hum1, k6v1 1.8.1-0.1.hum1, rust 1.99.0-0.1.hum1, skopeo 1.24.1-1.hum1, syft 1.54.0-0.1.hum1, +21 more Red Hat OpenShift Builds 1.8.3 openshift-builds/openshift-builds-waiters-rhel9 1792742966, openshift-builds/openshift-builds-waiters-rhel9 1792837567, openshift-builds/openshift-builds-webhook-rhel9 1792743329, openshift-builds/openshift-builds-webhook-rhel9 1792851895, openshift-builds/openshift-builds-rhel9-operator 1792742668, openshift-builds/openshift-builds-rhel9-operator 1792844269, +10 more Red Hat OpenShift Builds 1.9.2 openshift-builds/openshift-builds-waiters-rhel10 1792762119, openshift-builds/openshift-builds-waiters-rhel10 1792839475, openshift-builds/openshift-builds-webhook-rhel10 1792680944, openshift-builds/openshift-builds-webhook-rhel10 1792835571, openshift-builds/openshift-builds-operator-bundle 1792762900, openshift-builds/openshift-builds-operator-bundle 1792863311, +10 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
32 d ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go golang.org/x/text
<0.41.0
0.41.0

Affected products

  • golang.org/x/text golang.org/x/text/secure/precis

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.