CVE-2026-22782: Rustfs RustFS's RPC Signature Verification Logs Vulnerability

LOW
Advisory Identifier: GHSA-333v-68xh-8mmq
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CWE-532
Published
Advisory Summary

CVE-2026-22782 is a LOW rustfs's rpc signature verification logs vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Rustfs libraries in the crates.io ecosystem. The issue involves rustfs's rpc signature verification logs shared secret. Remediation is available by upgrading affected packages to version 1.0.0-alpha.80.

CVE-2026-22782 at a Glance

CVE Identifier CVE-2026-22782
GHSA Identifier GHSA-333v-68xh-8mmq
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Rustfs
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix CVE-2026-22782

To remediate this vulnerability, upgrade all affected Rustfs dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

rustfs fixed: 1.0.0-alpha.80 
Upgrade rustfs to 1.0.0-alpha.80
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for rustfs

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-22782, inspect your project dependencies for Rustfs:

inspect dependencies for rustfs

Analyze the terminal output to locate any version of Rustfs in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.0-alpha.80), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. In Rustfs, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary Invalid RPC signatures cause the server to log the shared HMAC secret (and expected signature), which exposes the secret to log readers and enables forged RPC calls. ### Details In [`crates/ecstore/src/rpc/http_auth.rs:115-122`](https://github.com/rustfs/rustfs/blob/9e162b6e9ebb874cc1d06a7b33bc4a05786578aa/crates/ecstore/src/rpc/http_auth.rs#L115-L122) , the invalid signature branch logs sensitive data: ```rs if signature != expected_signature { error!( "verify_rpc_signature: Invalid signature: secret {}, url {}, method {}, timestamp {}, signature {}, expected_signature {}", secret, url, method, timestamp, signature, expected_signature ); return Err(std::io::Error::other("Invalid signature")); } ``` This log line includes `secret` and `expected_signature`, both derived from the shared HMAC key. Any invalidly signed request triggers this path. The function is reachable from RPC and admin request handlers. ### PoC 1. Run RustFS with error logging enabled. 1. Send a request with an invalid signature: ``` ts=$(date +%s) curl -v \ -H "x-rustfs-timestamp: $ts" \ -H "x-rustfs-signature: invalid-signature" \ "http://localhost:9000/rustfs/rpc/read_file_stream?disk=foo&volume=bar&path=baz&offset=0&length=1" ``` 1. Observed output: ``` HTTP 403 AccessDenied: Invalid signature verify_rpc_signature: Invalid signature: secret rustfsadmin, url /rustfs/rpc/read_file_stream?disk=foo&volume=bar&path=baz&offset=0&length=1, method GET, timestamp 1767852115, signature invalid-signature, expected_signature oisNxNRTb80GXf97s/PGdScJzu8QB9Oxs+uOwf8RiK8= ``` ### Impact - Exposes the shared RPC HMAC secret to log readers. - Enables attackers with log access to forge valid RPC signatures and make unauthorized RPC calls.

CVE-2026-22782 Affected Rustfs Versions

1 component(s)
Fixed Versions:
1.0.0-alpha.80
Product / Package Ecosystem Affected Versions Fixed Version
rustfs
 crates.io
≥ 1.0.0-alpha.1
< 1.0.0-alpha.80
1.0.0-alpha.80

References

GitHub Advisory / Wiki ADVISORY
https://github.com/rustfs/rustfs/security/advisories/GHSA-333v-68xh-8mmq
NVD — CVE-2026-22782 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22782
Security Fix Commit FIX COMMIT
https://github.com/rustfs/rustfs/commit/6b2eebee1d07399ef02c0863bd515b4412a5a560
Rustfs Source Repository REPOSITORY
https://github.com/rustfs/rustfs
Rustfs Source Repository REPOSITORY
https://github.com/rustfs/rustfs/blob/9e162b6e9ebb874cc1d06a7b33bc4a05786578aa/crates/ecstore/src/rpc/http_auth.rs#L115-L122

Frequently Asked Questions

What is CVE-2026-22782?
CVE-2026-22782 is a security vulnerability in Rustfs involving RustFS's RPC signature verification logs shared secret under CWE-532: Insertion of Sensitive Information into Log File.
Which Rustfs versions are affected?
Affected versions include releases prior to 1.0.0-alpha.80 across affected packages: rustfs.
What version fixes CVE-2026-22782?
Upgrading to 1.0.0-alpha.80 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rustfs affected?
Yes, rustfs is affected in releases prior to 1.0.0-alpha.80. Upgrade your dependency to 1.0.0-alpha.80 or later.
What CWE is associated with CVE-2026-22782?
CVE-2026-22782 is classified under CWE-532: Insertion of Sensitive Information into Log File (The product writes sensitive information to a log file.).
How can I check crates.io dependencies for CVE-2026-22782?
Run the dependency tree command: 'inspect dependencies for rustfs'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-333v-68xh-8mmq",
  "modified" : "2026-01-16T19:10:59Z",
  "published" : "2026-01-16T15:48:58Z",
  "aliases" : [ "CVE-2026-22782" ],
  "summary" : "RustFS's RPC signature verification logs shared secret",
  "details" : "### Summary\nInvalid RPC signatures cause the server to log the shared HMAC secret (and expected signature), which exposes the secret to log readers and enables forged RPC calls.\n\n### Details\nIn [`crates/ecstore/src/rpc/http_auth.rs:115-122`](https://github.com/rustfs/rustfs/blob/9e162b6e9ebb874cc1d06a7b33bc4a05786578aa/crates/ecstore/src/rpc/http_auth.rs#L115-L122) , the invalid signature branch logs sensitive data:\n```rs\nif signature != expected_signature {\n    error!(\n        \"verify_rpc_signature: Invalid signature: secret {}, url {}, method {}, timestamp {}, signature {}, expected_signature {}\",\n        secret, url, method, timestamp, signature, expected_signature\n    );\n\n    return Err(std::io::Error::other(\"Invalid signature\"));\n}\n```\n\nThis log line includes `secret` and `expected_signature`, both derived from the shared HMAC key. Any invalidly signed request triggers this path. The function is reachable from RPC and admin request handlers.\n\n### PoC\n1. Run RustFS with error logging enabled.\n1. Send a request with an invalid signature:\n    ```\n     ts=$(date +%s)\n     curl -v \\\n       -H \"x-rustfs-timestamp: $ts\" \\\n       -H \"x-rustfs-signature: invalid-signature\" \\\n       \"http://localhost:9000/rustfs/rpc/read_file_stream?disk=foo&volume=bar&path=baz&offset=0&length=1\"\n    ```\n1. Observed output:\n    ```\n     HTTP 403 AccessDenied: Invalid signature\n     verify_rpc_signature: Invalid signature: secret rustfsadmin, url /rustfs/rpc/read_file_stream?disk=foo&volume=bar&path=baz&offset=0&length=1, method GET, timestamp 1767852115, signature invalid-signature, expected_signature oisNxNRTb80GXf97s/PGdScJzu8QB9Oxs+uOwf8RiK8=\n    ```\n### Impact\n\n- Exposes the shared RPC HMAC secret to log readers.\n- Enables attackers with log access to forge valid RPC signatures and make unauthorized RPC calls.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "rustfs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0-alpha.1"
      }, {
        "fixed" : "1.0.0-alpha.80"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.0.0-alpha.79"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/rustfs/rustfs/security/advisories/GHSA-333v-68xh-8mmq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-22782"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rustfs/rustfs/commit/6b2eebee1d07399ef02c0863bd515b4412a5a560"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rustfs/rustfs"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rustfs/rustfs/blob/9e162b6e9ebb874cc1d06a7b33bc4a05786578aa/crates/ecstore/src/rpc/http_auth.rs#L115-L122"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-532" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-16T15:48:58Z",
    "nvd_published_at" : "2026-01-16T17:15:54Z"
  }
}