CVE-2026-106492
HighCVSS 7.6Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
The @backstage/backend-defaults package before versions 0.16.1 and 0.17.8 improperly preserves access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths.
Risk Assessment
A restricted service could perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This may lead to unauthorized data modifications.
Recommendation
Update @backstage/backend-defaults to version 0.16.1 or 0.17.8 (or later). Review external service credential configurations for excessive permissions.
Related vulnerabilities
- CVE-2026-53921Critical
In odhcpd (the DHCPv6/DHCPv4/RA server used by OpenWrt) prior to version 25.12, the DHCPv6 IA response handler writes past a fixed 512-byte stack buffer (pdbuf) when a single DHCPv6 REQUEST carries enough IA options to nearly exhaust the reply space. Two independent overflow sites exist in the same call chain, both reachable over the network via a single unauthenticated UDP packet. odhcpd runs as root on OpenWrt, and embedded targets often lack stack canaries and ASLR, making code execution realistic.
- CVE-2026-114357Critical
In DJI CrystalSky ZS600C firmware v0.3.9.7 through v0.6.6.9, the Android Debug Bridge daemon (adbd) lacks authentication for a critical function. The device ships with ro.adb.secure=0 and USB ADB enabled by default; once ADB over TCP is enabled, the same unauthenticated shell (uid 2000) is reachable over the network. This provides a foothold for privilege escalation to root.
- CVE-2026-57116Critical
In PraisonAI from version 4.2.1 to before 4.6.59, the AgentOS FastAPI deployment surface remains unauthenticated despite the earlier fix for CVE-2026-40151. The chat route directly calls agent.chat(request.message), and both no-auth and wrong-bearer requests execute the deployed agent.
- CVE-2026-112859Critical
The Little Birdies WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Little Birdies from n/a through 1.3.16.
- CVE-2026-112858Critical
The Rhodos WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Rhodos from n/a through 1.3.3.
- CVE-2026-112857Critical
The Reprizo WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Reprizo from n/a through 1.0.8.
- CVE-2026-112856Critical
The Vagabonds WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Vagabonds from n/a through 1.3.10.
- CVE-2026-112855Critical
The Redy WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Redy from n/a through 1.3.5.
- CVE-2026-112854Critical
The Holistic Center WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Holistic Center from n/a through 1.2.6.
- CVE-2026-112853Critical
The Hallelujah WordPress theme contains a deserialization of untrusted data vulnerability that allows object injection. This issue affects Hallelujah from n/a through 1.1.1.
Original NVD description (English source)
Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS