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Not in CISA KEV
HIGH severity

Possible leak of key's raw field if declared length is incorrectGHSA-hm37-9xh2-q499

HIGHFix: scottcwang/openssh_key_parser#5

GHSA-hm37-9xh2-q499 is a high-severity (CVSS 7.7) CWE-209 vulnerability in openssh-key-parser. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for openssh-key-parser — see the affected versions and patch details below.

Also known asCVE-2022-31124PYSEC-2022-233
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-hm37-9xh2-q499.

EPSS Exploitation Probability

via FIRST.org ↗
1.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs71th percentile — riskier than 71% of all scored CVEsHighest risk
0.00%0.61%1.22%1.83%0.4%1.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍openssh-key-parser

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

If a field of a key is shorter than it is declared to be, the parser raises an error with a message containing the raw field value. An attacker able to modify the declared length of a key's sensitive field can thus expose the raw value of that field.

Patches

Upgrade to version 0.0.6, which no longer includes the raw field value in the error message.

Workarounds

N/A

References

N/A

For more information

If you have any questions or comments about this advisory:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIopenssh-key-parserall versions0.0.6pip install --upgrade 'openssh-key-parser==0.0.6'

Affected Products

1 product · 1 configurations
Application
openssh key parseropenssh_key_parser_project
< 0.0.6
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

openssh_key_parser is an open source Python package providing utilities …

github.comNVDJul 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openssh-key-parser, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update openssh-key-parser to 0.0.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hm37-9xh2-q499 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact If a field of a key is shorter than it is declared to be, the parser raises an error with a message containing the raw field value. An attacker able to modify the declared length of a key's sensitive field can thus expose the raw value of that field. ### Patches Upgrade to version 0.0.6, which no longer includes the raw field value in the error message. ### Workarounds N/A ### References N/A ### For more information If you have any questions or comments about this advisory: * Open an issue in [openssh_key_parser](https://github.com/scottcwang/openssh_key_parser)
O3 Security · Impact-Aware SCA

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Possible leak of key's raw field if declared length is incorrect