CVE-2020-1892
mediumpriority · track · 32EPSS 0.011 · 65 %ileEUUSEPSS · scored 2026-10-27
Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory, potentially leading to information leak and DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–8.1
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (30)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441dcnnvd
- https://hhvm.com/blog/2020/02/20/security-update.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-1892cnnvd
- https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441denisa_euvd
- https://hhvm.com/blog/2020/02/20/security-update.htmlenisa_euvd
- https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441dPatchnvd
- https://hhvm.com/blog/2020/02/20/security-update.htmlVendor Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan