CVE-2026-84445
Vulnerability Scoring
Analysis In Progress
CVE-2026-84445 Vulnerability Analysis & Exploit Details
CVE-2026-84445
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-84445 Details
Status: Received on 14 Sep 2026, 17:17 UTC
Published on: 14 Sep 2026, 17:17 UTC
CVSS Release:
CVE-2026-84445 Vulnerability Summary
CVE-2026-84445: gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.
Assessing the Risk of CVE-2026-84445
Access Complexity Graph
The exploitability of CVE-2026-84445 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-84445
No exploitability data is available for CVE-2026-84445.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-84445, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-84445, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2026-84445 does not compromise confidentiality.
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Integrity:
None
CVE-2026-84445 does not impact data integrity.
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Availability:
None
CVE-2026-84445 does not affect system availability.
CVE-2026-84445 References
External References
- https://github.com/grpc/grpc-go/commit/3822494d8ea03b992c089fd2a195f041762fffb7
- https://github.com/grpc/grpc-go/commit/8668b69c167df908b6b3666dcbf40992b9e932a4
- https://github.com/grpc/grpc-go/commit/93e31b48545e2a8aaeb6e06b47fb249f94e6297f
- https://github.com/grpc/grpc-go/issues/9354
- https://github.com/grpc/grpc-go/pull/9365
- https://github.com/grpc/grpc-go/pull/9366
- https://github.com/grpc/grpc-go/pull/9367
- https://github.com/grpc/grpc-go/releases/tag/v1.82.2
- https://github.com/grpc/grpc-go/releases/tag/v1.83.2
- https://github.com/grpc/grpc-go/security/advisories/GHSA-2v4p-qf9q-27wj
CWE Common Weakness Enumeration
CWE-248Protect Your Infrastructure against CVE-2026-84445: Combat Critical CVE Threats
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