Coturn up to 4.5.1 Loopback Interface confused deputy

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Coturn up to 4.5.1. Affected is an unknown function of the component Loopback Interface Handler. The manipulation results in confused deputy. This vulnerability is identified as CVE-2020-26262. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Coturn up to 4.5.1. Affected is an unknown functionality of the component Loopback Interface Handler. The manipulation with an unknown input leads to a confused deputy vulnerability. CWE is classifying the issue as CWE-441. The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 01/14/2021. The advisory is available at github.com. This vulnerability is traded as CVE-2020-26262. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 299987 (Linux Distros Unpatched Vulnerability : CVE-2026-27624), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.5.2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (299987). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.3
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Confused deputy
CWE: CWE-441
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 299987
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-27624

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Coturn 4.5.2
Patch: github.com

Timelineinfo

10/01/2020 🔍
01/14/2021 +105 days 🔍
01/14/2021 +0 days 🔍
02/26/2026 +1869 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-26262 (🔍)
GCVE (CVE): GCVE-0-2020-26262
GCVE (VulDB): GCVE-100-167826

Entryinfo

Created: 01/14/2021 08:18
Updated: 02/26/2026 18:12
Changes: 01/14/2021 08:18 (38), 02/13/2021 09:48 (6), 02/13/2021 09:54 (8), 02/26/2026 18:12 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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