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UnsafeAccessor 1.4.0 until 1.7.0 has no security checking for UnsafeAccess.getInstance()GHSA-cr6p-23cf-w9g9

MEDIUMFix: Karlatemp/UnsafeAccessor@4ef8300

GHSA-cr6p-23cf-w9g9 is a medium-severity (CVSS 5.9) Information Exposure vulnerability in io.github.karlatemp:unsafe-accessor. A fix is available for io.github.karlatemp:unsafe-accessor — see the affected versions and patch details below.

Also known asCVE-2022-31139
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-cr6p-23cf-w9g9.

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk+0.03%
Lower risk than most CVEs68th percentile — riskier than 68% of all scored CVEsHighest risk
0.00%0.57%1.14%1.70%0.3%1.2%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
☕io.github.karlatemp:unsafe-accessor

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

Description

UnsafeAccessor (UA) is a bridge to access jdk.internal.misc.Unsafe & sun.misc.Unsafe. Normally, if UA is loaded as a named module, the internal data of UA is protected by JVM and others can only access UA via UA's standard API. The main application can set up SecurityCheck.AccessLimiter for UA to limit access to UA. Starting with version 1.4.0 and prior to version 1.7.0, when SecurityCheck.AccessLimiter is set up, untrusted code can access UA without limitation, even when UA is loaded as a named module. This issue does not affect those for whom SecurityCheck.AccessLimiter is not set up. Version 1.7.0 contains a patch.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenio.github.karlatemp:unsafe-accessor≥ 1.4.0&&< 1.7.01.7.0io.github.karlatemp:unsafe-accessor:1.7.0

Affected Products

1 product · 1 configurations
Application
unsafe accessorunsafe_accessor_project
≥ 1.4.0 && < 1.7.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.github.karlatemp:unsafe-accessor, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update io.github.karlatemp:unsafe-accessor to 1.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-cr6p-23cf-w9g9 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Overview Affected versions have no limit to using unsafe-accessor. Can be ignored if `SecurityCheck.AccessLimiter` not setup ### Details If UA was loaded as a named module, the internal data of UA will be protected by JVM and others can only access UA via UA's standard api. Main application can setup `SecurityCheck.AccessLimiter` for UA to limit accesses to UA. Untrusted code can access UA without lmitation in affected versions even UA was loaded as a named module. ### References [The commit to fix](https://github.com/Karlatemp/UnsafeAccessor/commit/4ef83000184e8f13239a1ea2847ee401d81
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UnsafeAccessor 1.4.0 until 1.7.0 has no security checking…