CVE & CISA-KEV Catalog

CVE-2026-39832

HIGH
9.1
CVSS v3
NVD

Description

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

CWE-502Deserialization of Untrusted DataCWE-281

How to fix

Remediation Available
containerdAmazon
Fixed in:0:2.2.4-1.amzn2023.0.1
Fixed in:0:2.2.4-1.amzn2023.0.1
containerd-debuginfoAmazon
Fixed in:0:2.2.4-1.amzn2023.0.1
Fixed in:0:2.2.4-1.amzn2023.0.1
containerd-debugsourceAmazon
Fixed in:0:2.2.4-1.amzn2023.0.1
Fixed in:0:2.2.4-1.amzn2023.0.1
containerd-stressAmazon
Fixed in:0:2.2.4-1.amzn2023.0.1
Fixed in:0:2.2.4-1.amzn2023.0.1
containerd-stress-debuginfoAmazon
Fixed in:0:2.2.4-1.amzn2023.0.1
Fixed in:0:2.2.4-1.amzn2023.0.1
nerdctlAmazon
Fixed in:0:2.2.2-1.amzn2.0.3
Fixed in:0:2.2.2-1.amzn2.0.3
Fixed in:0:2.2.2-1.amzn2023.0.3
Fixed in:0:2.2.2-1.amzn2023.0.3
nerdctl-debuginfoAmazon
Fixed in:0:2.2.2-1.amzn2.0.3
Fixed in:0:2.2.2-1.amzn2.0.3
rcloneAmazon
Fixed in:0:1.74.2-80.amzn2023
Fixed in:0:1.74.2-80.amzn2023
rclone-debuginfoAmazon
Fixed in:0:1.74.2-80.amzn2023
Fixed in:0:1.74.2-80.amzn2023
rclone-debugsourceAmazon
Fixed in:0:1.74.2-80.amzn2023
Fixed in:0:1.74.2-80.amzn2023
runfinch-finchAmazon
Fixed in:0:1.17.1-1.amzn2023.0.2
Fixed in:0:1.17.1-1.amzn2023.0.2
golang-go.cryptoDebian
Fixed in:1:0.52.0-1CVE-2026-39832
aardvark-dns-2:1.10.1Red Hat / RHEL
Fixed in:2.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
aardvark-dns-2:1.10.1Rocky
Fixed in:2.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:2.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
aardvark-dns-2:1.5.0Rocky
Fixed in:2.module+el8.8.0+23884+2031fc78.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.src::container-tools:rhel8RHSA-2026:49944
aardvark-dns-2:1.5.0Red Hat / RHEL
Fixed in:2.module+el8.8.0+23884+2031fc78.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.src::container-tools:rhel8RHSA-2026:49944
Fixed in:2.module+el8.8.0+23884+2031fc78.ppc64le::container-tools:rhel8RHSA-2026:49944
buildahRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
buildahRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
buildah-1:1.29.8Rocky
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.src::container-tools:rhel8RHSA-2026:49944
buildah-1:1.29.8Red Hat / RHEL
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.src::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
buildah-2:1.33.14Rocky
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
buildah-2:1.33.14Red Hat / RHEL
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.src::container-tools:rhel8RHSA-2026:35833
buildah-debuginfoRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
buildah-debuginfoRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
buildah-debuginfo-1:1.29.8Rocky
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
buildah-debuginfo-1:1.29.8Red Hat / RHEL
Fixed in:1.module+el8.8.0+24545+b713e821.ppc64le::container-tools:rhel8RHSA-2026:49944
Fixed in:1.module+el8.8.0+24545+b713e821.x86_64::container-tools:rhel8RHSA-2026:49944
buildah-debuginfo-2:1.33.14Rocky
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
buildah-debuginfo-2:1.33.14Red Hat / RHEL
Fixed in:4.module+el8.10.0+24482+e50f4e4f.aarch64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.ppc64le::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.x86_64::container-tools:rhel8RHSA-2026:35833
Fixed in:4.module+el8.10.0+24482+e50f4e4f.s390x::container-tools:rhel8RHSA-2026:35833
buildah-debugsourceRocky
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
buildah-debugsourceRed Hat / RHEL
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el10_2RHSA-2026:36199
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410
Fixed in:2:1.43.1-3.el9_8RHSA-2026:37410

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U

Exploit Intelligence

0.60%probability of exploitation in 30 days
47thpercentile

Moderate risk: more likely to be exploited than 47% of all known CVEs.

References

Vendor Advisory1
Issue Tracking1
Mailing List1

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-0669High7.2100%KEV + RansomFix
CVE-2021-44228Critical10.0100%KEV + RansomFix
CVE-2021-35464Critical9.8100%KEV + RansomFix
CVE-2025-53770Critical9.8100%KEV + RansomFix
CVE-2023-29300Critical9.8100%KEV + Ransom-
CVE-2025-59287Critical9.8100%KEVFix

Common questions

How do I fix CVE-2026-39832?

Published advisories record a fix for 442 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-39832 being actively exploited?

Not that we know of. CVE-2026-39832 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.60% is the estimated probability that it will be exploited in the next 30 days. That is higher than 47% of all scored CVEs.

How severe is CVE-2026-39832?

CVE-2026-39832 has a CVSS v3 base score of 9.1, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-39832 affect?

Published advisories record a fix for containerd (Amazon), containerd-debuginfo (Amazon), containerd-debugsource (Amazon), containerd-stress (Amazon), and 438 more. The list on this page is capped, so there may be more.

Embed a live status badge for CVE-2026-39832
CVE-2026-39832 severity badge

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-15.