MediumVulnerabilityCVE-2026-115923updated 28 Oct 2026, 22:43 UTC
Backstage catalog rules can be bypassed for URL locations using encoded path segments
Fix availableOfficial source
| Severity | MediumCVSS 6.5 of 10 |
|---|---|
| Being exploited? | UnclearNo reports either way yet |
| Fix available? | Yes@backstage/plugin-catalog-backend 3.9.2, @backstage/plugin-catalog-backend 4.0.2 · since 28 Oct 2026 |
| How sure is this? | Official sourceBacked by an official source |
Are you affected?
| Package / product | Affected versions | Fixed in |
|---|---|---|
| @backstage/plugin-catalog-backend · npm | < 3.9.2 | 3.9.2 |
| @backstage/plugin-catalog-backend · npm | >= 4.0.0, < 4.0.2 | 4.0.2 |
Timeline
- 28 Oct 2026, 22:42 UTCPublicly disclosed
- 28 Oct 2026, 22:42 UTCReported by GitHub Advisory · GitHub Advisory
- 28 Oct 2026, 22:43 UTCPicked up by Zero Radar
Sources 1 report, oldest first
Official vendor, government CERT or advisory database
- Backstage catalog rules can be bypassed for URL locations using encoded path segmentsGitHub Advisory · 28 Oct 2026, 22:42 UTC
Technical details
- ID
- CVE-2026-115923 · GHSA-w658-mh9p-ww8f
- CVSS
- 6.5 / 10
- EPSS
- 0.3% chance of exploitation within 30 days
- Disclosed
- 28 Oct 2026, 22:42 UTC
- On Zero Radar
- 28 Oct 2026, 22:43 UTC (1 min after disclosure)
- Last change
- 28 Oct 2026, 22:43 UTC
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