CVE-2021-33198
HIGHCVSS 7.5/10EPSS 3.37%
Last modified
CVE-2021-33198 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Go before 1.15.13 and 1.16.x before 1.16.5, there can be a panic for a large exponent to the math/big.Rat SetString or UnmarshalText method.. EPSS estimates a 3.37% chance of exploitation in the next 30 days.
Description
In Go before 1.15.13 and 1.16.x before 1.16.5, there can be a panic for a large exponent to the math/big.Rat SetString or UnmarshalText method.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Golang | Go | < 1.15.13 |
| Golang | Go | >= 1.16.0, < 1.16.5 |
References
- https://groups.google.com/g/golang-announceThird Party Advisory
- https://groups.google.com/g/golang-announce/c/RgCMkAEQjSIExploit, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-02Third Party Advisory
- https://groups.google.com/g/golang-announceThird Party Advisory
- https://groups.google.com/g/golang-announce/c/RgCMkAEQjSIExploit, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202208-02Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-33198?
In Go before 1.15.13 and 1.16.x before 1.16.5, there can be a panic for a large exponent to the math/big.Rat SetString or UnmarshalText method.
How severe is CVE-2021-33198?
CVE-2021-33198 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.37% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33198?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-33198?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST