CVE-2026-106493: Backstage is an open framework for building developer portals

Routine

LOW 3.0WATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2026-106493 is a low-severity flaw (CVSS 3.0) affecting backstage, backstage\/backend-defaults, backstage\/plugin-catalog-backend-module-aws. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Backstage is an open framework for building developer portals. Prior to 1.54.6, cloud storage catalog providers did not sufficiently validate object paths. A principal able to create or rename objects in a configured Azure Blob Storage or AWS S3 catalog source could cause catalog descriptors to be read from outside the intended storage boundary, limited to locations reachable with the backend's configured credentials. This issue is fixed in 1.54.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	3.0 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-10-06
Last modified	2026-10-22

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 21:17 UTCPublished CVE record published
2026-10-22 13:13 UTCUpdated Record last modified

linuxfoundation backstage UPGRADE

Affected: < 1.54.6

Fixed in: 1.54.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy backstage || rpm -q backstage || backstage --version

2. UPGRADE to 1.54.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade backstage

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade backstage

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

linuxfoundation backstage\/backend-defaults UPGRADE

Affected: < 0.17.8

Fixed in: 0.17.8

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls backstagebackend-defaults

2. UPGRADE to 0.17.8

npm install backstagebackend-defaults@">=0.17.8"

linuxfoundation backstage\/plugin-catalog-backend-module-aws UPGRADE

Affected: < 0.4.27

Fixed in: 0.4.27

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls backstageplugin-catalog-backend-module-aws

2. UPGRADE to 0.4.27

npm install backstageplugin-catalog-backend-module-aws@">=0.4.27"

linuxfoundation backstage\/plugin-catalog-backend-module-azure UPGRADE

Affected: < 0.3.21

Fixed in: 0.3.21

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls backstageplugin-catalog-backend-module-azure

2. UPGRADE to 0.3.21

npm install backstageplugin-catalog-backend-module-azure@">=0.3.21"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-106493?

backstage: upgrade to 1.54.6; backstage\/backend-defaults: upgrade to 0.17.8; backstage\/plugin-catalog-backend-module-aws: upgrade to 0.4.27. Exact commands for each OS are on this page.

Is CVE-2026-106493 being exploited?

CVE-2026-106493 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-106493 affect?

CVE-2026-106493 affects backstage, backstage\/backend-defaults, backstage\/plugin-catalog-backend-module-aws. Severity is low (CVSS 3.0). Backstage is an open framework for building developer portals. Prior to 1.54.6, cloud storage catalog providers did not sufficiently validate object paths. A principal able to create or rename objects in a configured Azure Blob Storage or A

How urgent is CVE-2026-106493?

Priority 20/100. On your watchlist

Software pages

Azure vulnerabilities · AWS vulnerabilities

Related CVEs

CVE-2026-106461 MEDIUM 4.3 UPGRADE UPGRADE Backstage is an open framework for building developer portals
CVE-2026-106486 HIGH 8.5 UPGRADE UPGRADE Backstage is an open framework for building developer portals
CVE-2026-106463 MEDIUM 5.4 UPGRADE UPGRADE Backstage is an open framework for building developer portals
CVE-2026-106487 LOW 3.5 UPGRADE UPGRADE Backstage is an open framework for building developer portals
CVE-2026-106488 HIGH 8.1 UPGRADE UPGRADE Backstage is an open framework for building developer portals

References

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