CVE-2026-71436 (GCVE-0-2026-71436)
Vulnerability from cvelistv5 – Published: 2026-08-06 19:49 – Updated: 2026-08-07 16:17
VLAI
EPSS
VEX
Title
Mermaid XY Charts are vulnerable to an infinite loop DoS
Summary
Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 16:15 UTC
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/mermaid-js/mermaid/security/ad… | x_refsource_CONFIRM |
| https://github.com/mermaid-js/mermaid/pull/8022 | x_refsource_MISC |
| https://github.com/mermaid-js/mermaid/commit/630a… | x_refsource_MISC |
| https://github.com/mermaid-js/mermaid/commit/ef60… | x_refsource_MISC |
| https://github.com/mermaid-js/mermaid/releases/ta… | x_refsource_MISC |
| https://github.com/mermaid-js/mermaid/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| mermaid-js | mermaid |
Affected:
>= 10.6.0, < 10.9.8
Affected: >= 11.0.0-alpha.1, < 11.16.1 |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-71436",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-07T16:15:22.877895Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-07T16:17:15.115Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "mermaid",
"vendor": "mermaid-js",
"versions": [
{
"status": "affected",
"version": "\u003e= 10.6.0, \u003c 10.9.8"
},
{
"status": "affected",
"version": "\u003e= 11.0.0-alpha.1, \u003c 11.16.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1325",
"description": "CWE-1325: Improperly Controlled Sequential Memory Allocation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-06T19:49:44.739Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7"
},
{
"name": "https://github.com/mermaid-js/mermaid/pull/8022",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/pull/8022"
},
{
"name": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289"
},
{
"name": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a"
},
{
"name": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1"
},
{
"name": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8"
}
],
"source": {
"advisory": "GHSA-2v8p-3f2j-5mp7",
"discovery": "UNKNOWN"
},
"title": "Mermaid XY Charts are vulnerable to an infinite loop DoS"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-71436",
"datePublished": "2026-08-06T19:49:44.739Z",
"dateReserved": "2026-08-06T16:28:51.183Z",
"dateUpdated": "2026-08-07T16:17:15.115Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-71436",
"date": "2026-09-19",
"epss": "0.00408",
"percentile": "0.34818"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "mermaid",
"vendor": "mermaid-js",
"versions": [
{
"status": "affected",
"version": "\u003e= 10.6.0, \u003c 10.9.8"
},
{
"status": "affected",
"version": "\u003e= 11.0.0-alpha.1, \u003c 11.16.1"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1."
}
],
"id": "CVE-2026-71436",
"lastModified": "2026-09-08T20:53:06.753",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "security-advisories@github.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-71436",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-07T16:15:22.877895Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-06T22:18:30.563",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/mermaid-js/mermaid/pull/8022"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-835"
},
{
"lang": "en",
"value": "CWE-1325"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-11T20:28:23+00:00",
"cve": "CVE-2026-71436",
"id": "CVE-2026-71436",
"initial_release_date": "2026-08-06T19:49:44.739000+00:00",
"product_status:known_affected": "1",
"product_status:known_not_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "mermaid: Mermaid XY Charts: Denial of Service via invalid X-Axis parameters",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71436.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-07T16:58:41Z",
"cve": "CVE-2026-71436",
"id": "CVE-2026-71436",
"initial_release_date": "2026-08-07T16:58:41Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-71436",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-71436.json",
"version": "2"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-71436",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-07T16:15:22.877895Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-07T16:16:11.519Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "mermaid",
"vendor": "mermaid-js",
"versions": [
{
"status": "affected",
"version": "\u003e= 10.6.0, \u003c 10.9.8"
},
{
"status": "affected",
"version": "\u003e= 11.0.0-alpha.1, \u003c 11.16.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1325",
"description": "CWE-1325: Improperly Controlled Sequential Memory Allocation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-06T19:49:44.739Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7"
},
{
"name": "https://github.com/mermaid-js/mermaid/pull/8022",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/pull/8022"
},
{
"name": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289"
},
{
"name": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a"
},
{
"name": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1"
},
{
"name": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8"
}
],
"source": {
"advisory": "GHSA-2v8p-3f2j-5mp7",
"discovery": "UNKNOWN"
},
"title": "Mermaid XY Charts are vulnerable to an infinite loop DoS"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-71436",
"datePublished": "2026-08-06T19:49:44.739Z",
"dateReserved": "2026-08-06T16:28:51.183Z",
"dateUpdated": "2026-08-07T16:17:15.115Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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…