TI-2026-19375 Aliases CVE-2026-24047 GHSA-2p49-45hj-7mc9

@backstage/cli-common has a possible `resolveSafeChildPath` Symlink Chain Bypass

LOW 29CWE-59Published 2026-01-21 · Updated 2026-01-22

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-59 and the CVSS impact.

Summary

Backstage is an open framework for building developer portals, and @backstage/cli-common provides config loading functionality used by the backend and command line interface of Backstage. Prior to version 0.1.17, the `resolveSafeChildPath` utility function in `@backstage/backend-plugin-api`, which is used to prevent path traversal attacks, failed to properly validate symlink chains and dangling symlinks. An attacker could bypass the path validation via symlink chains (creating `link1 → link2 → /outside` where intermediate symlinks eventually resolve outside the allowed directory) and dangling symlinks (creating symlinks pointing to non-existent paths outside the base directory, which would later be created during file operations). This function is used by Scaffolder actions and other backend components to ensure file operations stay within designated directories. This vulnerability is fixed in `@backstage/backend-plugin-api` version 0.1.17. Users should upgrade to this version or later. Some workarounds are available. Run Backstage in a containerized environment with limited filesystem access and/or restrict template creation to trusted users.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00534 45th percentileScored 2026-11-07

Fix Partial backstage (backstage): 0.1.17@backstage/cli-common (npm): 0.1.17Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
backstage	backstage	before 0.1.17	0.1.17	Patch available	CNA
—	@backstage/cli-common (npm)	before 0.1.17	0.1.17	Patch available	GHSA-2p49-45hj-7mc9

backstage Vendorbackstage Affected before 0.1.17 Fixed in 0.1.17 Patch available CNA
@backstage/cli-common (npm) Vendor— Affected before 0.1.17 Fixed in 0.1.17 Patch available GHSA-2p49-45hj-7mc9

Remediation

Fix · CNA backstage (backstage) Fixed in 0.1.17
Fix · GHSA-2p49-45hj-7mc9 @backstage/cli-common (npm) Fixed in 0.1.17 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Developer Hub 1	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-24047
2026-10-03 Alias added: GHSA-2p49-45hj-7mc9
2026-10-27 Affected versions changed · Red Hat

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-24047

Other 3

TI-2026-33119 Malware in 42 @tanstack/* packages exfiltrates cloud credentials, GitHub tokens, and SSH keys KEVCVSS 3.1CRITICAL 9.6
TI-2018-10499 Integer overflow in backstage kernel KEVCVSS 3.0HIGH 7.8
TI-2024-08998 Remote Code Execution in kedro-org/kedro CVSS 3.0CRITICAL 9.8
TI-2023-12294 Dragonfly2 vulnerable to hard coded cyptographic key CVSS 3.1CRITICAL 9.8
TI-2021-12074 Authentication vulnerability in MOSN v.0.23.0 allows attacker to escalate privileges via… CVSS 3.1CRITICAL 9.8
TI-2019-04061 runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows… CVSS 3.1HIGH 8.6

See all 662 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences