No exploitation reportedFix available

CVE-2026-46597

Q: Is CVE-2026-46597 actively exploited?

Active exploitation of CVE-2026-46597 has not been confirmed. Its EPSS score was 0.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-46597?

CVE-2026-46597 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2026-05-22
Fixed in0.52.0
WeaknessCWE-704

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.

Timeline

dates in UTC

2026-05-2204:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-46597?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-46597?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Golang crypto

Branch	Affected	Fixed in	Source
0.52	< 0.52.0	0.52.0	NVD · OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2026-46597 Red Hat Product Security597 products fixed · 135 known affected
golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted AES-GCM packet decoder inputs
assisted/agent-preinstall-image-builder-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · openshift-builds/openshift-builds-controller-rhel9 as a component of Builds for Red Hat OpenShift · openshift-builds/openshift-builds-git-cloner-rhel9 as a component of Builds for Red Hat OpenShift · +132 more
RHSA-2026:82785 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.14.76 bug fix and security update
RHSA-2026:82813 Red Hat Product Security8 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.15.70 bug fix and security update
RHSA-2026:83480 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.19.52 bug fix and security update
RHSA-2026:83702 Red Hat Product Security8 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.21.39 bug fix and security update
RHSA-2026:83502 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.20.43 bug fix and security update

86 more advisories

Full record on NVD

Fix

Update Golang crypto to 0.52.0
Vendor fix Red Hat Product Security RHSA-2026:82785 · 4 productsFor OpenShift Container Platform 4.14 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:82813 · 8 productsFor OpenShift Container Platform 4.15 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:83480 · 4 productsFor OpenShift Container Platform 4.19 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:83702 · 8 productsFor OpenShift Container Platform 4.21 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:83502 · 4 productsFor OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Vendor fix Red Hat Product Security RHSA-2026:83703 · 4 productsSee the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/ Details on how…

Advisories and patches

pkg.go.devVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-05-22
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52026-05-22
NVDweakness (CWE)CWE-704read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-22
OSVaffected packages—
Microsoft MSRCadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-05-22
Last Modified: 2026-07-23
NVD status: Analyzed
MSRC Title: Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh

Frequently asked questions

What is CVE-2026-46597?

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.

Is CVE-2026-46597 actively exploited?

Active exploitation of CVE-2026-46597 has not been confirmed. Its EPSS score was 0.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-46597?

CVE-2026-46597 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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