CVE & CISA-KEV Catalog

CVE-2026-29186

HIGH
7.7
CVSS v3
NVD

Description

Backstage is an open framework for building developer portals. Prior to version 1.14.3, this is a configuration bypass vulnerability that enables arbitrary code execution. The @backstage/plugin-techdocs-node package uses an allowlist to filter dangerous MkDocs configuration keys during the documentation build process. A gap in this allowlist allows attackers to craft an mkdocs.yml that causes arbitrary Python code execution, completely bypassing TechDocs' security controls. This issue has been patched in version 1.14.3.

CWE-74InjectionCWE-434Unrestricted File UploadCWE-791

How to fix

Remediation Available
registry.redhat.io/rhdh/rhdhRed Hat / RHEL
Fixed in:hub-rhel9@sha256:80453720616cee369e9f79863ef1815a2741afdeb25d3572085d11ad54afa9a0_amd64RHSA-2026:13826
Fixed in:rhel9-operator@sha256:7118207df52574eb4eb9a6b35aa23eef8029937c2ace807b5e132bcc5188a972_amd64RHSA-2026:13826
Fixed in:operator-bundle@sha256:47c3fc5bfb21e980f0fa6c510c48c97982649c7f27d9d486a19391c56c9531ff_amd64RHSA-2026:13826
Fixed in:hub-rhel9@sha256:bb763e2b7a9d101f73b03b9e1c5688e7034fd9d31413e890817bd4098a7d42f9_amd64RHSA-2026:9742
Fixed in:rhel9-operator@sha256:f09d63af77eec6b131067a08b1bd3a8c7673f9e68325bfde1ae081f85d73598c_amd64RHSA-2026:9742
Fixed in:operator-bundle@sha256:b40f228ed49b81e675763d0bb1e38e7a45c45eef8003237abfbddbfb952bb331_amd64RHSA-2026:9742
registry.redhat.io/rhdh/rhdhRocky
Fixed in:hub-rhel9@sha256:80453720616cee369e9f79863ef1815a2741afdeb25d3572085d11ad54afa9a0_amd64RHSA-2026:13826
Fixed in:rhel9-operator@sha256:7118207df52574eb4eb9a6b35aa23eef8029937c2ace807b5e132bcc5188a972_amd64RHSA-2026:13826
Fixed in:operator-bundle@sha256:47c3fc5bfb21e980f0fa6c510c48c97982649c7f27d9d486a19391c56c9531ff_amd64RHSA-2026:13826
Fixed in:hub-rhel9@sha256:bb763e2b7a9d101f73b03b9e1c5688e7034fd9d31413e890817bd4098a7d42f9_amd64RHSA-2026:9742
Fixed in:rhel9-operator@sha256:f09d63af77eec6b131067a08b1bd3a8c7673f9e68325bfde1ae081f85d73598c_amd64RHSA-2026:9742
Fixed in:operator-bundle@sha256:b40f228ed49b81e675763d0bb1e38e7a45c45eef8003237abfbddbfb952bb331_amd64RHSA-2026:9742

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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 RequiredLow
User InteractionNone
ScopeChanged

Impact

ConfidentialityHigh
IntegrityLow
AvailabilityLow

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

Exploit Intelligence

0.78%probability of exploitation in 30 days
52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-74 (Injection) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2013-2251Critical9.8100%KEVFix
CVE-2023-22527Critical9.8100%KEV + RansomFix
CVE-2019-2725Critical9.8100%KEV + RansomFix
CVE-2022-46169Critical9.8100%KEVFix
CVE-2022-35914Critical9.8100%KEV-
CVE-2019-17558High7.599%KEVFix
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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 2026-07-15.