What is the CVSS score of CVE-2026-91993?

CVE-2026-91993 has a CVSS 4.0 base score of 5.3 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.3%.

Is there a public PoC exploit available for CVE-2026-91993?

Yes, a public proof-of-concept exploit is available for CVE-2026-91993. Prioritise patching immediately. EPSS: 0.3%.

Jpom CVE-2026-91993

EUVD-2026-78433 MEDIUM

Authorization Bypass Through User-Controlled Key (CWE-639)

2026-09-15 VulnCheck

GHSA-q5h7-5rfp-9ghc

Authentication Bypass Dromara Jpom

5.3

CVSS 4.0 · Vendor: VulnCheck

View

Vulnerability Assessment

Weakness

CWE

CWE-639

OWASP Top 10:2025

A01:2025 - Broken Access Control

ASVS 5.0

V8 - Authorization Object-level authorization, IDOR prevention

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

Jpom through 2.11.12 exposes a broken object-level authorization flaw on the /build/branch-list endpoint, letting any authenticated user supply a repositoryId belonging to a different workspace and have the server resolve it without verifying ownership. This enables cross-workspace repository enumeration, disclosure of repository type, and execution of git ls-remote calls that reuse another workspace's stored Git credentials, leaking private repository metadata. Exploitation is low-complexity over the network with only a low-privileged account required, and publicly available exploit code exists, though the CVSS 4.0 base score is only 5.3 because the impact is limited to confidentiality.

Affected VersionsENISA

Jpom 0 ≤2.11.12

Affected Packages

euvd jpom no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (VulnCheck) PRIMARY 5.3 MEDIUM

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

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

Low

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

None

Vulnerable system: Availability

None

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

DescriptionCVE.org

Jpom through 2.11.12 fails to validate workspace ownership when resolving repositoryId on the /build/branch-list endpoint, allowing authenticated users to access repositories from other workspaces. Attackers can submit repository identifiers from different workspaces to enumerate repository existence, determine repository type, and execute git ls-remote commands using other workspaces' stored credentials.

Threat Intelligence Overview

EPSS Score

0.3%

Top 83% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.3%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.