CVE-2025-6279: Upsonic Upsonic Has Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-rpfv-46xj-5984
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CVSS 5.5
CWE-502 CWE-20
Published
Advisory Summary

CVE-2025-6279 is a LOW (CVSS 5.5) upsonic has vulnerability vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Upsonic libraries in the PyPI ecosystem. The issue involves upsonic has vulnerability in pickle handler component that can lead to deserialization. Remediation is available by upgrading affected packages to version 0.56.0.

CVE-2025-6279 at a Glance

CVE Identifier CVE-2025-6279
GHSA Identifier GHSA-rpfv-46xj-5984
Severity LOW
CVSS v3.1 Base Score 5.5
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Upsonic
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2025-6279

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

upsonic fixed: 0.56.0 
pip install upsonic>=0.56.0
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 upsonic

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-6279, inspect your installed packages using pip:

pip show upsonic

Analyze the terminal output to locate any version of Upsonic in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.56.0), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Upsonic, 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

A vulnerability, which was classified as critical, has been found in Upsonic up to 0.55.6. This issue affects the function cloudpickle.loads of the file /tools/add_tool of the component Pickle Handler. The manipulation leads to deserialization. The exploit has been disclosed to the public and may be used.

CVE-2025-6279 Affected Upsonic Versions

1 component(s)
Fixed Versions:
0.56.0
Product / Package Ecosystem Affected Versions Fixed Version
upsonic
pypi/upsonic
PyPI
< 0.56.0
0.56.0

References

NVD — CVE-2025-6279 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6279
Upsonic Source Repository REPOSITORY
https://github.com/Upsonic/Upsonic/issues/353
Upsonic Source Repository REPOSITORY
https://github.com/Upsonic/Upsonic/pull/360
Upsonic Source Repository REPOSITORY
https://github.com/Upsonic/Upsonic/pull/360#issuecomment-2979387098
Security Fix Commit FIX COMMIT
https://github.com/Upsonic/Upsonic/commit/a54529acc6e4bfe28f4f5c80c058144348a306b7
Upsonic Source Repository REPOSITORY
https://github.com/Upsonic/Upsonic
Upsonic Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/upsonic/PYSEC-2025-68.yaml
vuldb.com/ WEB
https://vuldb.com/?ctiid.313283
vuldb.com/ WEB
https://vuldb.com/?id.313283
vuldb.com/ WEB
https://vuldb.com/?submit.593099

Frequently Asked Questions

What is CVE-2025-6279?
CVE-2025-6279 is a security vulnerability in Upsonic involving Upsonic has vulnerability in Pickle Handler component that can lead to deserialization under CWE-502: Deserialization of Untrusted Data.
Which Upsonic versions are affected?
Affected versions include releases prior to 0.56.0 across affected packages: upsonic.
What version fixes CVE-2025-6279?
Upgrading to 0.56.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is upsonic affected?
Yes, upsonic is affected in releases prior to 0.56.0. Upgrade your dependency to 0.56.0 or later.
What is the CVSS score of CVE-2025-6279?
CVE-2025-6279 has a CVSS v3.1 base score of 5.5 (LOW) with vector string CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2025-6279?
CVE-2025-6279 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check PyPI dependencies for CVE-2025-6279?
Run the dependency tree command: 'pip show upsonic'. 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-rpfv-46xj-5984",
  "modified" : "2025-07-09T01:01:57Z",
  "published" : "2025-06-19T21:31:19Z",
  "aliases" : [ "CVE-2025-6279" ],
  "summary" : "Upsonic has vulnerability in Pickle Handler component that can lead to deserialization",
  "details" : "A vulnerability, which was classified as critical, has been found in Upsonic up to 0.55.6. This issue affects the function cloudpickle.loads of the file /tools/add_tool of the component Pickle Handler. The manipulation leads to deserialization. The exploit has been disclosed to the public and may be used.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "upsonic"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.56.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-6279"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Upsonic/Upsonic/issues/353"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Upsonic/Upsonic/pull/360"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Upsonic/Upsonic/pull/360#issuecomment-2979387098"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Upsonic/Upsonic/commit/a54529acc6e4bfe28f4f5c80c058144348a306b7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Upsonic/Upsonic"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/upsonic/PYSEC-2025-68.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?ctiid.313283"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?id.313283"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?submit.593099"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-502" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-07-09T01:01:57Z",
    "nvd_published_at" : "2025-06-19T21:15:27Z"
  }
}