CVE-2024-26150
`@backstage/backend-common` vulnerable to path traversal through symlinks
@backstage/backend-common is a common functionality library for backends for Backstage, an open platform for building developer portals. In @backstage/backend-common prior to versions 0.21.1, 0.20.2, and 0.19.10, paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers. This issue is patched in @backstage/backend-common versions 0.21.1, 0.20.2, and 0.19.10.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
`@backstage/backend-common` vulnerable to path traversal through symlinks
@backstage/backend-common is a common functionality library for backends for Backstage, an open platform for building developer portals. In @backstage/backend-common prior to versions 0.21.1, 0.20.2, and 0.19.10, paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers. This issue is patched in @backstage/backend-common versions 0.21.1, 0.20.2, and 0.19.10.
- Record
CVE-2024-26150- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2024-0471
@backstage/backend-common is a common functionality library for backends for Backstage, an open platform for building developer portals. In @backstage/backend-common prior to versions 0.21.1, 0.20.2, and 0.19.10, paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers. This issue is patched in @backstage/backend-common versions 0.21.1, 0.20.2, and 0.19.10.
- Record
EUVD-2024-0471- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2fc9-xpp8-2g9h
`@backstage/backend-common` vulnerable to path traversal through symlinks
Impact
Paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers.
Patches
Patched in @backstage/backend-common version 0.21.1.
Patched in @backstage/backend-common version 0.20.2.
Patched in @backstage/backend-common version 0.19.10.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the Backstage repository
- Visit our Discord, linked to in Backstage README
- Record
GHSA-2fc9-xpp8-2g9h- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
NVD
@backstage/backend-common is a common functionality library for backends for Backstage, an open platform for building developer portals. In @backstage/backend-common prior to versions 0.21.1, 0.20.2, and 0.19.10, paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers. This issue is patched in @backstage/backend-common versions 0.21.1, 0.20.2, and 0.19.10.
- Record
CVE-2024-26150- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
`@backstage/backend-common` vulnerable to path traversal through symlinks
@backstage/backend-common is a common functionality library for backends for Backstage, an open platform for building developer portals. In @backstage/backend-common prior to versions 0.21.1, 0.20.2, and 0.19.10, paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers. This issue is patched in @backstage/backend-common versions 0.21.1, 0.20.2, and 0.19.10.
- Record
CVE-2024-26150- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSVGHSA-2fc9-xpp8-2g9h
`@backstage/backend-common` vulnerable to path traversal through symlinks
Impact
Paths checks with the resolveSafeChildPath utility were not exhaustive enough, leading to risk of path traversal vulnerabilities if symlinks can be injected by attackers.
Patches
Patched in @backstage/backend-common version 0.21.1.
Patched in @backstage/backend-common version 0.20.2.
Patched in @backstage/backend-common version 0.19.10.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the Backstage repository
- Visit our Discord, linked to in Backstage README
- Record
GHSA-2fc9-xpp8-2g9h- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@backstage/backend-commonnpm | 0.21.0 to 0.21.0 | 0.21.1 |
@backstage/backend-commonnpm | before 0.19.10 | 0.19.10 |
@backstage/backend-commonnpm | 0.20.0 up to 0.20.2 | 0.20.2 |
@backstage/backend-commonnpm | 0.21.0 up to 0.21.1 | 0.21.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-26150 is a high vulnerability (CVSS 8.7) in Backstage, published February 23, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.80%, the 57th percentile. Fixed in @backstage/backend-common 0.21.1.
References
github.com/backstage/backstage/security/advisories/GHSA-2fc9-xpp8-2g9h
nvd.nist.gov/vuln/detail/CVE-2024-26150