CVE-2021-43801 (GCVE-0-2021-43801)
Vulnerability from cvelistv5 – Published: 2021-12-13 19:30 – Updated: 2024-08-04 04:03
VLAI
EPSS
VEX
Title
Uncaught Exception in mercurius
Summary
Mercurius is a GraphQL adapter for Fastify. Any users from Mercurius@8.10.0 to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to `/graphql` unless they are using a custom error handler. The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2. As a workaround users may use a custom error handler.
Severity
7.5 (High)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/mercurius-js/mercurius/securit… | x_refsource_CONFIRM |
| https://github.com/mercurius-js/mercurius/issues/677 | x_refsource_MISC |
| https://github.com/mercurius-js/mercurius/pull/67… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| mercurius-js | mercurius |
Affected:
>= 8.10.0, < 8.11.2
|
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T04:03:08.899Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/mercurius-js/mercurius/issues/677"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "mercurius",
"vendor": "mercurius-js",
"versions": [
{
"status": "affected",
"version": "\u003e= 8.10.0, \u003c 8.11.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Mercurius is a GraphQL adapter for Fastify. Any users from Mercurius@8.10.0 to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to `/graphql` unless they are using a custom error handler. The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2. As a workaround users may use a custom error handler."
}
],
"metrics": [
{
"cvssV3_1": {
"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"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-754",
"description": "CWE-754: Improper Check for Unusual or Exceptional Conditions",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-12-13T19:30:12.000Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mercurius-js/mercurius/issues/677"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223"
}
],
"source": {
"advisory": "GHSA-273r-rm8g-7f3x",
"discovery": "UNKNOWN"
},
"title": "Uncaught Exception in mercurius",
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2021-43801",
"STATE": "PUBLIC",
"TITLE": "Uncaught Exception in mercurius"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "mercurius",
"version": {
"version_data": [
{
"version_value": "\u003e= 8.10.0, \u003c 8.11.2"
}
]
}
}
]
},
"vendor_name": "mercurius-js"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Mercurius is a GraphQL adapter for Fastify. Any users from Mercurius@8.10.0 to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to `/graphql` unless they are using a custom error handler. The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2. As a workaround users may use a custom error handler."
}
]
},
"impact": {
"cvss": {
"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"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-754: Improper Check for Unusual or Exceptional Conditions"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x",
"refsource": "CONFIRM",
"url": "https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x"
},
{
"name": "https://github.com/mercurius-js/mercurius/issues/677",
"refsource": "MISC",
"url": "https://github.com/mercurius-js/mercurius/issues/677"
},
{
"name": "https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223",
"refsource": "MISC",
"url": "https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223"
}
]
},
"source": {
"advisory": "GHSA-273r-rm8g-7f3x",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2021-43801",
"datePublished": "2021-12-13T19:30:12.000Z",
"dateReserved": "2021-11-16T00:00:00.000Z",
"dateUpdated": "2024-08-04T04:03:08.899Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-43801",
"date": "2026-09-17",
"epss": "0.01522",
"percentile": "0.73366"
},
"fkie_nvd": {
"configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:mercurius_project:mercurius:*:*:*:*:*:node.js:*:*\", \"versionStartIncluding\": \"8.10.0\", \"versionEndExcluding\": \"8.11.2\", \"matchCriteriaId\": \"8746C91F-FFCB-4ECD-BE62-EDFF7D9AACC6\"}]}]}]",
"descriptions": "[{\"lang\": \"en\", \"value\": \"Mercurius is a GraphQL adapter for Fastify. Any users from Mercurius@8.10.0 to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to `/graphql` unless they are using a custom error handler. The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2. As a workaround users may use a custom error handler.\"}, {\"lang\": \"es\", \"value\": \"Mercurius es un adaptador GraphQL para Fastify. Cualquier usuario de Mercurius@ versiones 8.10.0 a 8.11.1, est\\u00e1 sujeto a un ataque de denegaci\\u00f3n de servicio mediante el env\\u00edo de un JSON malformado a \\\"/graphql\\\" a menos que est\\u00e9 usando un administrador de errores personalizado. La vulnerabilidad ha sido corregida en https://github.com/mercurius-js/mercurius/pull/678 y ha sido distribuida en la versi\\u00f3n 8.11.2. Como soluci\\u00f3n, los usuarios pueden usar un administrador de errores personalizado\"}]",
"id": "CVE-2021-43801",
"lastModified": "2024-11-21T06:29:49.173",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"security-advisories@github.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:N/A:P\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
"published": "2021-12-13T20:15:07.577",
"references": "[{\"url\": \"https://github.com/mercurius-js/mercurius/issues/677\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Issue Tracking\", \"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x\", \"source\": \"security-advisories@github.com\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/mercurius-js/mercurius/issues/677\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Issue Tracking\", \"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}, {\"url\": \"https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Third Party Advisory\"]}]",
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"security-advisories@github.com\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-754\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-43801\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2021-12-13T20:15:07.577\",\"lastModified\":\"2026-06-17T04:11:27.953\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Mercurius is a GraphQL adapter for Fastify. Any users from Mercurius@8.10.0 to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to `/graphql` unless they are using a custom error handler. The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2. As a workaround users may use a custom error handler.\"},{\"lang\":\"es\",\"value\":\"Mercurius es un adaptador GraphQL para Fastify. Cualquier usuario de Mercurius@ versiones 8.10.0 a 8.11.1, est\u00e1 sujeto a un ataque de denegaci\u00f3n de servicio mediante el env\u00edo de un JSON malformado a \\\"/graphql\\\" a menos que est\u00e9 usando un administrador de errores personalizado. La vulnerabilidad ha sido corregida en https://github.com/mercurius-js/mercurius/pull/678 y ha sido distribuida en la versi\u00f3n 8.11.2. Como soluci\u00f3n, los usuarios pueden usar un administrador de errores personalizado\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"mercurius-js\",\"product\":\"mercurius\",\"versions\":[{\"version\":\"\u003e= 8.10.0, \u003c 8.11.2\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-754\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mercurius_project:mercurius:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"8.10.0\",\"versionEndExcluding\":\"8.11.2\",\"matchCriteriaId\":\"8746C91F-FFCB-4ECD-BE62-EDFF7D9AACC6\"}]}]}],\"references\":[{\"url\":\"https://github.com/mercurius-js/mercurius/issues/677\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/mercurius-js/mercurius/issues/677\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/mercurius-js/mercurius/pull/678/commits/732b2f895312da8deadd7b173dcd2d141d54b223\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/mercurius-js/mercurius/security/advisories/GHSA-273r-rm8g-7f3x\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]}]}}",
"redhat_vex": {
"current_release_date": "2026-03-27T13:21:33+00:00",
"cve": "CVE-2021-43801",
"id": "CVE-2021-43801",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Uncaught Exception in mercurius",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-43801.json",
"version": "3"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…