CVE-2026-82639

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 43.1% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-10.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-30 13:23Z2 MO AGO

Last updated

2026-09-24 14:20Z1 MO AGO

Reserved

2026-08-30

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

135b70ba1f9699da94292b3f83b5b341842aff1c0327b5bcb75e9db40b30d0a3

• github.comGitHub Issue #6814https://github.com/ChatGPTNextWeb/NextChat/issues/6814issue-tracking
• github.comhttps://github.com/ChatGPTNextWeb/NextChatproduct
• github.comhttps://github.com/ChatGPTNextWeb/NextChat/blob/v2.16.1/app/api/proxy.tstechnical-description
• www.vulncheck.comVulnCheck Advisory: NextChat 2.15.8 through 2.16.1 OpenAI API Key Disclosurehttps://www.vulncheck.com/advisories/nextchat-2.15.8-through-2.16.1-openai-api-key-disclosurethird-party-advisory