CVE-2021-42836

CVE-2021-42836 is a high-severity vulnerability in Gjson Project Gjson with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Description

GJSON before 1.9.3 allows a ReDoS (regular expression denial of service) attack.

Frequently asked questions

What is CVE-2021-42836?
GJSON before 1.9.3 allows a ReDoS (regular expression denial of service) attack.
How severe is CVE-2021-42836?
CVE-2021-42836 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-42836 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42836?
CVE-2021-42836 affects Gjson Project Gjson. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42836?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-42836 published?
CVE-2021-42836 was published on 2021-10-22 and last updated on 2026-06-17.

References

Affected products (1)

More vulnerabilities in Gjson Project Gjson

All CVEs affecting Gjson Project Gjson →

Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities

Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →