OpenTofu up to 1.11.3 Init Command init denial of service

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in OpenTofu up to 1.11.3. The impacted element is the function init of the component Init Command. This manipulation causes denial of service. The identification of this vulnerability is CVE-2026-74797. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in OpenTofu up to 1.11.3 and classified as problematic. Affected by this vulnerability is the function init of the component Init Command. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

OpenTofu versions before 1.11.4 contain a denial of service vulnerability in the tofu init command when processing maliciously-crafted .zip archives for provider or module packages. Attackers can cause excessive CPU usage by controlling .zip archive content served during dependency installation, degrading system performance and preventing timely completion of the init process.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-74797 since 08/16/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.11.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-2864). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Open Source OpenTofu

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.1
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenTofu 1.11.4

Timelineinfo

08/16/2026 Advisory disclosed
08/16/2026 +0 days CVE reserved
08/16/2026 +0 days VulDB entry created
08/17/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-74797 (🔒)
GCVE (CVE): GCVE-0-2026-74797
GCVE (VulDB): GCVE-100-391189
CERT Bund: WID-SEC-2026-2864 - OpenTofu: Mehrere Schwachstellen

Entryinfo

Created: 08/16/2026 16:30
Updated: 08/17/2026 22:52
Changes: 08/16/2026 16:30 (76), 08/17/2026 22:52 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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