Skip to main content
Public proof of conceptFix available

CVE-2025-6279

A public proof of concept exists; no exploitation attested.

  • Published2025-06-19
  • WeaknessCWE-20 · CWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2025-06-1921:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-6279?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-6279?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Upsonic
BranchAffectedFixed in
0.55≤ 0.55.6no fix published
upsonic
BranchAffectedFixed in
0.56< 0.56.00.56.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionpoc2025-06-23
  • OpenCVESSVC decisionpoc—
  • CNACVSS 4.02read 2026-10-23
  • CNACVSS 3.15.5read 2026-10-23
  • NVDCVSS 3.18read 2026-10-23
  • CNACVSS 2.05.2read 2026-10-23
  • CNAweakness (CWE)CWE-20, CWE-502read 2026-10-23
  • NVDweakness (CWE)CWE-502read 2026-10-23
  • FIRST EPSSEPSS score0.5 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
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
Published
2025-06-19
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2025-6279?

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.

Is CVE-2025-6279 actively exploited?

A proof-of-concept exploit exists for CVE-2025-6279, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-6279?

CVE-2025-6279 has a CVSS v3 base score of 8 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Running upsonic? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, October 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database