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4 vulnerabilities by browserslist
CVE-2026-73089 (GCVE-0-2026-73089)
Vulnerability from nvd – Published: 2026-08-11 17:05 – Updated: 2026-08-13 14:07
VLAI
EPSS
VEX
Title
Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM
Summary
Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, index.js retains every distinct `(queries, context)` result in cache and every parseQueries() AST in parseCache without a size cap, TTL, or eviction, allowing an attacker who can influence repeated browserslist() query values, including valid since `<year>-<month>-<day>` queries, to bypass the caller-controlled BROWSERSLIST_DISABLE_CACHE mitigation and cause linear memory growth followed by an out-of-memory process crash. This issue is fixed in version 4.28.7.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:14 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/browserslist/browserslist/secu… | x_refsource_CONFIRM |
| https://github.com/browserslist/browserslist/comm… | x_refsource_MISC |
| https://github.com/browserslist/browserslist/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| browserslist | browserslist |
Affected:
< 4.28.7
|
{
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"id": "CVE-2026-73089",
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{
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],
"role": "CISA Coordinator",
"timestamp": "2026-08-13T13:14:03.856150Z",
"version": "2.0.3"
},
"type": "ssvc"
}
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "browserslist",
"vendor": "browserslist",
"versions": [
{
"status": "affected",
"version": "\u003c 4.28.7"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, index.js retains every distinct `(queries, context)` result in cache and every parseQueries() AST in parseCache without a size cap, TTL, or eviction, allowing an attacker who can influence repeated browserslist() query values, including valid since `\u003cyear\u003e-\u003cmonth\u003e-\u003cday\u003e` queries, to bypass the caller-controlled BROWSERSLIST_DISABLE_CACHE mitigation and cause linear memory growth followed by an out-of-memory process crash. This issue is fixed in version 4.28.7."
}
],
"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": [
{
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"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
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}
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/browserslist/browserslist/security/advisories/GHSA-c83g-rgw3-j3cx",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-c83g-rgw3-j3cx"
},
{
"name": "https://github.com/browserslist/browserslist/commit/f2931a3ff2a3a31abf84ef01a7400b270aad6405",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/commit/f2931a3ff2a3a31abf84ef01a7400b270aad6405"
},
{
"name": "https://github.com/browserslist/browserslist/releases/tag/4.28.7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"
}
],
"source": {
"advisory": "GHSA-c83g-rgw3-j3cx",
"discovery": "UNKNOWN"
},
"title": "Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM"
}
},
"cveMetadata": {
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"datePublished": "2026-08-11T17:05:38.760Z",
"dateReserved": "2026-08-10T19:37:41.445Z",
"dateUpdated": "2026-08-13T14:07:57.169Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-73088 (GCVE-0-2026-73088)
Vulnerability from nvd – Published: 2026-08-11 17:00 – Updated: 2026-08-13 14:50
VLAI
EPSS
VEX
Title
Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)
Summary
Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:50 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/browserslist/browserslist/secu… | x_refsource_CONFIRM |
| https://github.com/browserslist/browserslist/comm… | x_refsource_MISC |
| https://github.com/browserslist/browserslist/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| browserslist | browserslist |
Affected:
< 4.28.7
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-73088",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-13T14:50:35.461987Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T14:50:43.387Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "browserslist",
"vendor": "browserslist",
"versions": [
{
"status": "affected",
"version": "\u003c 4.28.7"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7."
}
],
"metrics": [
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"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": [
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"type": "CWE"
}
]
},
{
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"description": "CWE-248: Uncaught Exception",
"lang": "en",
"type": "CWE"
}
]
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],
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},
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{
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"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
},
{
"name": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"
},
{
"name": "https://github.com/browserslist/browserslist/releases/tag/4.28.7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"
}
],
"source": {
"advisory": "GHSA-73wf-gq98-2v4g",
"discovery": "UNKNOWN"
},
"title": "Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)"
}
},
"cveMetadata": {
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73088",
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"state": "PUBLISHED"
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CVE-2026-73089 (GCVE-0-2026-73089)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:05 – Updated: 2026-08-13 14:07
VLAI
EPSS
VEX
Title
Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM
Summary
Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, index.js retains every distinct `(queries, context)` result in cache and every parseQueries() AST in parseCache without a size cap, TTL, or eviction, allowing an attacker who can influence repeated browserslist() query values, including valid since `<year>-<month>-<day>` queries, to bypass the caller-controlled BROWSERSLIST_DISABLE_CACHE mitigation and cause linear memory growth followed by an out-of-memory process crash. This issue is fixed in version 4.28.7.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:14 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/browserslist/browserslist/secu… | x_refsource_CONFIRM |
| https://github.com/browserslist/browserslist/comm… | x_refsource_MISC |
| https://github.com/browserslist/browserslist/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| browserslist | browserslist |
Affected:
< 4.28.7
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-73089",
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},
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},
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}
],
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"timestamp": "2026-08-13T13:14:03.856150Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "browserslist",
"vendor": "browserslist",
"versions": [
{
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}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, index.js retains every distinct `(queries, context)` result in cache and every parseQueries() AST in parseCache without a size cap, TTL, or eviction, allowing an attacker who can influence repeated browserslist() query values, including valid since `\u003cyear\u003e-\u003cmonth\u003e-\u003cday\u003e` queries, to bypass the caller-controlled BROWSERSLIST_DISABLE_CACHE mitigation and cause linear memory growth followed by an out-of-memory process crash. This issue is fixed in version 4.28.7."
}
],
"metrics": [
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"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"
}
}
],
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{
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{
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"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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},
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{
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],
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},
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"name": "https://github.com/browserslist/browserslist/commit/f2931a3ff2a3a31abf84ef01a7400b270aad6405",
"tags": [
"x_refsource_MISC"
],
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},
{
"name": "https://github.com/browserslist/browserslist/releases/tag/4.28.7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"
}
],
"source": {
"advisory": "GHSA-c83g-rgw3-j3cx",
"discovery": "UNKNOWN"
},
"title": "Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73089",
"datePublished": "2026-08-11T17:05:38.760Z",
"dateReserved": "2026-08-10T19:37:41.445Z",
"dateUpdated": "2026-08-13T14:07:57.169Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-73088 (GCVE-0-2026-73088)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:00 – Updated: 2026-08-13 14:50
VLAI
EPSS
VEX
Title
Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)
Summary
Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:50 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/browserslist/browserslist/secu… | x_refsource_CONFIRM |
| https://github.com/browserslist/browserslist/comm… | x_refsource_MISC |
| https://github.com/browserslist/browserslist/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| browserslist | browserslist |
Affected:
< 4.28.7
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-73088",
"options": [
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},
{
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},
{
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}
],
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"timestamp": "2026-08-13T14:50:35.461987Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T14:50:43.387Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "browserslist",
"vendor": "browserslist",
"versions": [
{
"status": "affected",
"version": "\u003c 4.28.7"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7."
}
],
"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-1321",
"description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-248",
"description": "CWE-248: Uncaught Exception",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-11T17:00:05.869Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
},
{
"name": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"
},
{
"name": "https://github.com/browserslist/browserslist/releases/tag/4.28.7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"
}
],
"source": {
"advisory": "GHSA-73wf-gq98-2v4g",
"discovery": "UNKNOWN"
},
"title": "Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73088",
"datePublished": "2026-08-11T17:00:05.869Z",
"dateReserved": "2026-08-10T19:37:41.445Z",
"dateUpdated": "2026-08-13T14:50:43.387Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}