CVE-2021-42836 - Vulnerability Details - OpenCVE

Description

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

Published: 2021-10-22

Score: 7.5 High

EPSS: 2.4% Low

KEV: No

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:gjson_project:gjson:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-2240	GJSON before 1.9.3 allows a ReDoS (regular expression denial of service) attack.
Github GHSA	GHSA-ppj4-34rq-v8j9	github.com/tidwall/gjson Vulnerable to REDoS attack

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.02415.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944
https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96
https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3
https://github.com/tidwall/gjson/issues/236
https://github.com/tidwall/gjson/issues/237

History

No history.

Subscriptions

Gjson Project Gjson

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-10-22T17:22:47.000Z

Updated: 2024-08-04T03:38:50.219Z

Reserved: 2021-10-22T00:00:00.000Z

Link: CVE-2021-42836

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-10-22T18:15:14.897

Modified: 2026-06-17T04:10:11.053

Link: CVE-2021-42836

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-400
Uncontrolled Resource Consumption

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "GJSON before 1.9.3 allows a ReDoS (regular expression denial of service) attack."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-10-22T17:22:47.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/tidwall/gjson/issues/236"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/tidwall/gjson/issues/237"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-42836", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "GJSON before 1.9.3 allows a ReDoS (regular expression denial of service) attack."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/tidwall/gjson/issues/236", "refsource": "MISC", "url": "https://github.com/tidwall/gjson/issues/236"}, {"name": "https://github.com/tidwall/gjson/issues/237", "refsource": "MISC", "url": "https://github.com/tidwall/gjson/issues/237"}, {"name": "https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96", "refsource": "MISC", "url": "https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96"}, {"name": "https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3", "refsource": "MISC", "url": "https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3"}, {"name": "https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944", "refsource": "MISC", "url": "https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:38:50.219Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tidwall/gjson/issues/236"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tidwall/gjson/issues/237"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-42836", "datePublished": "2021-10-22T17:22:47.000Z", "dateReserved": "2021-10-22T00:00:00.000Z", "dateUpdated": "2024-08-04T03:38:50.219Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gjson_project:gjson:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F0248C7-EA4B-42FB-9DEE-EA81C56D563E", "versionEndExcluding": "1.9.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "GJSON before 1.9.3 allows a ReDoS (regular expression denial of service) attack."}, {"lang": "es", "value": "GJSON versiones anteriores a 1.9.3, permite un ataque de tipo ReDoS (expresi\u00f3n regular de denegaci\u00f3n de servicio)"}], "id": "CVE-2021-42836", "lastModified": "2026-06-17T04:10:11.053", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-22T18:15:14.897", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/issues/236"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/issues/237"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/commit/590010fdac311cc8990ef5c97448d4fec8f29944"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/commit/77a57fda87dca6d0d7d4627d512a630f89a91c96"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/compare/v1.9.2...v1.9.3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/issues/236"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/tidwall/gjson/issues/237"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "nvd@nist.gov", "type": "Primary"}]}