CVE-2026-73080

Status: DeferredCritical (9.3)—

SeaweedFS is a distributed storage system. Prior to 4.24, VolumeServer.FetchAndWriteNeedle in weed/server/volume_grpc_remote.go fetches a caller-supplied remote endpoint through weed/remote_storage/s3/s3_storage_client.go and writes the response into a needle. The RPC performs no authentication and no target validation, allowing anyone who can reach a volume server's gRPC port to cause requests to arbitrary hosts, including loopback, link-local, RFC 1918, and cloud metadata endpoints such as 169.254.169.254, and read the response.

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On cloud deployments, this can disclose instance metadata and IAM credentials and reach otherwise unexposed internal services. The volume server gRPC plane is unauthenticated by default, and configuring documented JWT signing keys does not protect this RPC. This issue is fixed in version 4.24.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Base score: 9.3

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.53%
Percentile among all scored CVEs: 43
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access92 %
Primary impactT1090.004 Domain Frontingcommand and control90 %
Secondary impactT1005 Data from Local Systemcollection88 %
Secondary impactT1552.007 Container APIcredential access85 %

SeaweedFS VolumeServer expone RPC sin autenticación (gRPC unauthenticated por defecto) permitiendo a atacantes remotos no autenticados (PR:N, UI:N) hacer requests a hosts arbitrarios incluyendo metadata endpoints cloud (169.254.169.254), constituyendo SSRF. Discierne credenciales IAM y datos interno

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Network Segmentation Limit Access to Resource Over Network Vulnerability Scanning User Account Management SSL/TLS Inspection

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Seaweedfs — Seaweedfs^AI

CWEs

CWE-918

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-73080",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-08-13T14:53:35.922157Z"
        }
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 4.7,
        "exploitabilityScore": 3.9
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  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
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          "versions": [
            {
              "status": "affected",
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  "published": "2026-08-11T16:17:39.857",
  "references": [
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      "url": "https://github.com/seaweedfs/seaweedfs/commit/69da20bdaec923e5a43d8aa71bf3c0a2051fc019",
      "source": "security-advisories@github.com"
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      "url": "https://github.com/seaweedfs/seaweedfs/pull/9441",
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      "url": "https://github.com/seaweedfs/seaweedfs/releases/tag/4.24",
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      "value": "SeaweedFS is a distributed storage system. Prior to 4.24, VolumeServer.FetchAndWriteNeedle in weed/server/volume_grpc_remote.go fetches a caller-supplied remote endpoint through weed/remote_storage/s3/s3_storage_client.go and writes the response into a needle. The RPC performs no authentication and no target validation, allowing anyone who can reach a volume server's gRPC port to cause requests to arbitrary hosts, including loopback, link-local, RFC 1918, and cloud metadata endpoints such as 169.254.169.254, and read the response. On cloud deployments, this can disclose instance metadata and IAM credentials and reach otherwise unexposed internal services. The volume server gRPC plane is unauthenticated by default, and configuring documented JWT signing keys does not protect this RPC. This issue is fixed in version 4.24."
    }
  ],
  "lastModified": "2026-09-09T20:46:02.457",
  "sourceIdentifier": "security-advisories@github.com"
}