Resource exhaustion in Opentofu
CVE-2026-74797
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (18.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Opentofu — versions 0, 1.11.4
Weakness classification (CWE)
References
- github.com/opentofu/opentofu/security/advisories/GHSA-r92c-9c7f-3pj8 (vendor-advisory)
- www.vulncheck.com/advisories/opentofu-before-denial-of-service-via-malicious-zip (third-party-advisory)
Frequently asked questions
- What is CVE-2026-74797?
- CVE-2026-74797 is a low-severity vulnerability in Opentofu, classified under Uncontrolled Resource Consumption. CVSS score: 3.1/10. Published 2026-08-16.
- How severe is CVE-2026-74797?
- Low severity. CVSS v3 base score is 3.1 out of 10.