CVE-2026-56860

MEDIUM

5.9

CVSS v3

Description

Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.

CWE-407

How to fix

Remediation Available

stdlibGo

Fixed in:1.27.0-rc.3GO-2026-6218

aardvark-dns-2:1.10.1Rocky

Fixed in:2.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

aardvark-dns-2:1.10.1Red Hat / RHEL

Fixed in:2.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:2.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

buildahRed Hat / RHEL

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

buildahRocky

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

buildah-2:1.33.14Rocky

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

buildah-2:1.33.14Red Hat / RHEL

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

buildah-debuginfoRed Hat / RHEL

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

buildah-debuginfoRocky

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

buildah-debuginfo-2:1.33.14Red Hat / RHEL

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

buildah-debuginfo-2:1.33.14Rocky

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

buildah-debugsourceRocky

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

buildah-debugsourceRed Hat / RHEL

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

buildah-debugsource-2:1.33.14Red Hat / RHEL

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

buildah-debugsource-2:1.33.14Rocky

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

buildah-testsRocky

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

buildah-testsRed Hat / RHEL

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

buildah-tests-2:1.33.14Red Hat / RHEL

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

buildah-tests-2:1.33.14Rocky

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

buildah-tests-debuginfoRed Hat / RHEL

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

buildah-tests-debuginfoRocky

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

Fixed in:2:1.43.1-5.el10_2RHSA-2026:63332

Fixed in:2:1.43.1-6.el10_2RHSA-2026:64777

buildah-tests-debuginfo-2:1.33.14Red Hat / RHEL

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

buildah-tests-debuginfo-2:1.33.14Rocky

Fixed in:6.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:6.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

cockpit-podman-0:84.1Rocky

Fixed in:1.module+el8.10.0+24790+ef71b018.noarch::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

cockpit-podman-0:84.1Red Hat / RHEL

Fixed in:1.module+el8.10.0+24790+ef71b018.noarch::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

conmon-3:2.1.10Rocky

Fixed in:1.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

conmon-3:2.1.10Red Hat / RHEL

Fixed in:1.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.src::container-tools:rhel8RHSA-2026:63163

conmon-debuginfo-3:2.1.10Red Hat / RHEL

Fixed in:1.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

conmon-debuginfo-3:2.1.10Rocky

Fixed in:1.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

conmon-debugsource-3:2.1.10Red Hat / RHEL

Fixed in:1.module+el8.10.0+24790+ef71b018.ppc64le::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.aarch64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.x86_64::container-tools:rhel8RHSA-2026:63163

Fixed in:1.module+el8.10.0+24790+ef71b018.s390x::container-tools:rhel8RHSA-2026:63163

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.52%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Other references4

Related Vulnerabilities

Other CWE-407 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-27223	Medium	5.2	78%	-	Fix
CVE-2022-36021	Medium	5.5	61%	-	Fix
CVE-2021-33582	High	7.5	3.1%	-	Fix
CVE-2024-43485	High	7.5	3.1%	-	Fix
CVE-2024-43484	High	7.5	2.9%	-	Fix
CVE-2016-10396	High	7.5	2.9%	-	-

Common questions

How do I fix CVE-2026-56860?

Published advisories record a fix for 337 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-2026-56860 being actively exploited?

Not that we know of. CVE-2026-56860 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.52% is the estimated probability that it will be exploited in the next 30 days. That is higher than 43% of all scored CVEs.

How severe is CVE-2026-56860?

CVE-2026-56860 has a CVSS v3 base score of 5.9, rated moderate. 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-2026-56860 affect?

Published advisories record a fix for stdlib (Go), aardvark-dns-2:1.10.1 (Rocky), aardvark-dns-2:1.10.1 (Red Hat / RHEL), buildah (Red Hat / RHEL), and 333 more. The list on this page is capped, so there may be more.

Embed a live status badge for CVE-2026-56860

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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 2026-09-03.