CVE-2021-42771
HIGHCVSS 7.8/10EPSS 0.72%
Last modified
CVE-2021-42771 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Babel.Locale in Babel before 2.9.1 allows attackers to load arbitrary locale .dat files (containing serialized Python objects) via directory traversal, leading to code execution.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.
Description
Babel.Locale in Babel before 2.9.1 allows attackers to load arbitrary locale .dat files (containing serialized Python objects) via directory traversal, leading to code execution.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Pocoo | Babel | < 2.9.1 |
| Debian | Debian Linux | 10.0 |
References
- https://github.com/python-babel/babel/pull/782Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00018.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts/2021/10/msg00040.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-5018Third Party Advisory
- https://www.tenable.com/security/research/tra-2021-14Exploit, Third Party Advisory
- https://github.com/python-babel/babel/pull/782Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00018.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts/2021/10/msg00040.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-5018Third Party Advisory
- https://www.tenable.com/security/research/tra-2021-14Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42771?
Babel.Locale in Babel before 2.9.1 allows attackers to load arbitrary locale .dat files (containing serialized Python objects) via directory traversal, leading to code execution.
How severe is CVE-2021-42771?
CVE-2021-42771 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42771?
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-2021-42771?
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Scan your code nowSource: NVD / NIST