What is the CVSS score of CVE-2026-22455?

CVE-2026-22455 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-22455?

Within 24 hours: Identify all systems running Thebe <= 1.3.0 and assess if they process untrusted user input. Within 7 days: Implement WAF rules to filter XSS payloads and restrict Thebe to internal networks only if business-critical; disable Thebe if not essential. Within 30 days: Monitor vendor repositories for patch availability and prepare upgrade testing; evaluate alternative solutions or request patch timeline from foreverpinetree.

CVE-2026-22455

HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-03-05 audit@patchstack.com

XSS

7.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Re-analysis Queued

Apr 22, 2026 - 21:37 vuln.today

cvss_changed

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 05, 2026 - 06:16 nvd

HIGH 7.1

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in foreverpinetree Thebe thebe allows Reflected XSS.This issue affects Thebe: from n/a through <= 1.3.0.

AnalysisAI

Reflected XSS in Thebe up to version 1.3.0 enables attackers to inject malicious scripts into web pages viewed by users, potentially compromising session data and user interactions across different sites. The vulnerability requires user interaction through a crafted link but has no authentication requirement, making it accessible to unauthenticated attackers. No patch is currently available.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects foreverpinetree Thebe thebe. Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in foreverpinetree Thebe thebe allows Reflected XSS.This issue affects Thebe: from n/a through <= 1.3.0.

Affected ProductsAI

Product: foreverpinetree Thebe thebe.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.