What is the CVSS score of CVE-2026-0558?

CVE-2026-0558 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Lollms are affected by CVE-2026-0558?

Parisneo LOLLMS versions 2.2.0 and earlier contain an unauthenticated file upload vulnerability in the text extraction API endpoint that could allow attackers to exhaust system resources or access…. A patch is available.

How to fix or mitigate CVE-2026-0558?

Within 24 hours: Identify all instances of LOLLMS ≤2.2.0 in your environment and restrict network access to the `/api/files/extract-text` endpoint via firewall or API gateway rules. Within 7 days: Upgrade all affected LOLLMS deployments to version 2.2.1 or later per vendor advisory. Within 30 days: Conduct audit logs review for the `/api/files/extract-text` endpoint to identify any suspicious file upload activity during the exposure window.

Lollms CVE-2026-0558

EUVD-2026-17035 CRITICAL

Improper Authentication (CWE-287)

2026-03-29 security@huntr.dev

Authentication Bypass Denial Of Service Information Disclosure Lollms

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 05:47 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

2.2.0

EUVD ID Assigned

Mar 29, 2026 - 18:22 euvd

EUVD-2026-17035

Analysis Generated

Mar 29, 2026 - 18:22 vuln.today

CVE Published

Mar 29, 2026 - 18:16 nvd

CRITICAL 9.8

DescriptionCVE.org

A vulnerability in parisneo/lollms, up to and including version 2.2.0, allows unauthenticated users to upload and process files through the /api/files/extract-text endpoint. This endpoint does not enforce authentication, unlike other file-related endpoints, and lacks the Depends(get_current_active_user) dependency. This issue can lead to denial of service (DoS) through resource exhaustion, information disclosure, and violation of the application's documented security policies.

AnalysisAI

Unauthenticated file upload in parisneo/lollms versions ≤2.2.0 enables remote attackers to submit arbitrary files for text extraction without authentication via the /api/files/extract-text endpoint. The vulnerability (CWE-287: Improper Authentication) allows resource exhaustion DoS attacks and potential information disclosure, with CVSS 7.5 (High) reflecting network-accessible attack surface requiring no privileges. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send unauthenticated request to /api/files/extract-text

Delivery

Upload malicious file without authentication

Exploit

Trigger text extraction processing

Execution

Exhaust server resources causing denial of service

Impact

Access sensitive information from processed files

Access

Send unauthenticated request to /api/files/extract-text

Delivery

Upload malicious file without authentication

Exploit

Trigger text extraction processing

Execution

Exhaust server resources causing denial of service

Impact

Access sensitive information from processed files

Vulnerability AssessmentAI

Exploitation	Unauthenticated remote attacker can exploit parisneo/lollms up to version 2.2.0 by sending crafted file uploads to the `/api/files/extract-text` endpoint, which lacks authentication enforcement. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	Real-world risk is elevated due to the network-accessible attack vector (AV:N) and zero authentication requirements (PR:N), enabling trivial exploitation by unauthenticated internet-facing attackers. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated remote attacker identifies an internet-facing lollms instance (via Shodan, certificate transparency logs, or targeted reconnaissance) and sends crafted HTTP POST requests to the `/api/files/extract-text` endpoint with large or specially crafted files. Since no authentication is required, the attacker can repeatedly upload files to exhaust server memory and CPU resources during text extraction processing, causing denial of service for legitimate users. …
Remediation	Upstream fix available via GitHub commit a6625dc83786ff21d109b0d545ca61b770607ef3, which adds the missing authentication dependency to the vulnerable endpoint. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all instances of LOLLMS ≤2.2.0 in your environment and restrict network access to the /api/files/extract-text endpoint via firewall or API gateway rules. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-0558 vulnerability details – vuln.today

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Lollms CVE-2026-0558

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

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