CVE-2026-22798: Hermes Hermes's Raw Options Logging May Vulnerability

MODERATE
Advisory Identifier: GHSA-jm5j-jfrm-hm23
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CVSS 5.9
CWE-532
Published
Advisory Summary

CVE-2026-22798 is a MODERATE (CVSS 5.9) hermes's raw options logging may vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Hermes libraries in the PyPI ecosystem. The issue involves hermes's raw options logging may disclose secrets passed in via subcommand options argument. Remediation is available by upgrading affected packages to version 0.9.1.

CVE-2026-22798 at a Glance

CVE Identifier CVE-2026-22798
GHSA Identifier GHSA-jm5j-jfrm-hm23
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Hermes
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-22798

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

hermes fixed: 0.9.1 
pip install hermes>=0.9.1
Verify Direct and Transitive Dependencies

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

pip show hermes

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-22798, inspect your installed packages using pip:

pip show hermes

Analyze the terminal output to locate any version of Hermes in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.9.1), your application is affected.

Note: The pip show hermes command checks currently installed packages in your active Python environment.

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 Hermes, 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

Thanks, @thunze for reporting this! `hermes` subcommands take arbitrary options under the `-O` argument. These have been logged in raw form since https://github.com/softwarepub/hermes/commit/7f64f102e916c76dc44404b77ab2a80f5a4e59b1 in: https://github.com/softwarepub/hermes/blob/3a92f42b2b976fdbc2c49a621de6d665364a7cee/src/hermes/commands/cli.py#L66 If users provide sensitive data such as API tokens (e.g., via `hermes deposit -O invenio_rdm.auth_token SECRET`), these are written to the log file in plain text, making them available to whoever can access the log file. ### Impact As currently, `hermes.log` is not yet uploaded automatically as an artifact in CI, this vuln impacts: - local users working on shared access computers, where logs may be written to a commonly accessible file system - CI users whose CI logs are accessible to others, e.g., through group or organization rights Potentially, if the changes merged from https://github.com/softwarepub/ci-templates/pull/13 are merged into `ci-templates` via https://github.com/softwarepub/ci-templates/pull/14, this would automate the disclosure of Invenio auth tokens at least for all CI runs against Invenio instances! ### Patches This has been patched in [`hermes` 0.9.1](TODO) by masking all values passed using `-O`. ### Workarounds Upgrade to `hermes` >= 0.9.1.

CVE-2026-22798 Affected Hermes Versions

1 component(s)
Fixed Versions:
0.9.1
Product / Package Ecosystem Affected Versions Fixed Version
hermes
pypi/hermes
PyPI
≥ 0.8.1
< 0.9.1
0.9.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/softwarepub/hermes/security/advisories/GHSA-jm5j-jfrm-hm23
NVD — CVE-2026-22798 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22798
Security Fix Commit FIX COMMIT
https://github.com/softwarepub/hermes/commit/7f64f102e916c76dc44404b77ab2a80f5a4e59b1
Security Fix Commit FIX COMMIT
https://github.com/softwarepub/hermes/commit/90cb86acd026e7841f2539ae7a1b284a7f263514
Hermes Source Repository REPOSITORY
https://github.com/softwarepub/hermes

Frequently Asked Questions

What is CVE-2026-22798?
CVE-2026-22798 is a security vulnerability in Hermes involving hermes's raw options logging may disclose secrets passed in via subcommand options argument under CWE-532: Insertion of Sensitive Information into Log File.
Which Hermes versions are affected?
Affected versions include releases prior to 0.9.1 across affected packages: hermes.
What version fixes CVE-2026-22798?
Upgrading to 0.9.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hermes affected?
Yes, hermes is affected in releases prior to 0.9.1. Upgrade your dependency to 0.9.1 or later.
What is the CVSS score of CVE-2026-22798?
CVE-2026-22798 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N.
What CWE is associated with CVE-2026-22798?
CVE-2026-22798 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 PyPI dependencies for CVE-2026-22798?
Run the dependency tree command: 'pip show hermes'. 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-jm5j-jfrm-hm23",
  "modified" : "2026-01-13T20:30:54Z",
  "published" : "2026-01-13T20:30:54Z",
  "aliases" : [ "CVE-2026-22798" ],
  "summary" : "hermes's raw options logging may disclose secrets passed in via subcommand options argument",
  "details" : "Thanks, @thunze for reporting this!\n\n`hermes` subcommands take arbitrary options under the `-O` argument. These have been logged in raw form since https://github.com/softwarepub/hermes/commit/7f64f102e916c76dc44404b77ab2a80f5a4e59b1 in: https://github.com/softwarepub/hermes/blob/3a92f42b2b976fdbc2c49a621de6d665364a7cee/src/hermes/commands/cli.py#L66\n\nIf users provide sensitive data such as API tokens (e.g., via `hermes deposit -O invenio_rdm.auth_token SECRET`), these are written to the log file in plain text, making them available to whoever can access the log file.\n\n### Impact\n\nAs currently, `hermes.log` is not yet uploaded automatically as an artifact in CI, this vuln impacts:\n\n- local users working on shared access computers, where logs may be written to a commonly accessible file system\n- CI users whose CI logs are accessible to others, e.g., through group or organization rights\n\nPotentially, if the changes merged from https://github.com/softwarepub/ci-templates/pull/13 are merged into `ci-templates` via https://github.com/softwarepub/ci-templates/pull/14, this would automate the disclosure of Invenio auth tokens at least for all CI runs against Invenio instances!\n\n### Patches\n\nThis has been patched in [`hermes` 0.9.1](TODO) by masking all values passed using `-O`.\n\n### Workarounds\n\nUpgrade to `hermes` >= 0.9.1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "hermes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.8.1"
      }, {
        "fixed" : "0.9.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.9.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/softwarepub/hermes/security/advisories/GHSA-jm5j-jfrm-hm23"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-22798"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/softwarepub/hermes/commit/7f64f102e916c76dc44404b77ab2a80f5a4e59b1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/softwarepub/hermes/commit/90cb86acd026e7841f2539ae7a1b284a7f263514"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/softwarepub/hermes"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-532" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-13T20:30:54Z",
    "nvd_published_at" : "2026-01-12T22:16:08Z"
  }
}