CVE-2026-58207 (GCVE-0-2026-58207)
Vulnerability from cvelistv5 – Published: 2026-07-08 20:15 – Updated: 2026-07-09 14:41
VLAI
EPSS
VEX
Title
NATS Server: Remote crash via integer overflow in Connz pagination
Summary
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal arithmetic before the response window was safely bounded. This issue is fixed in versions 2.14.3 and 2.12.12.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 14:21 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/nats-io/nats-server/security/a… | x_refsource_CONFIRM |
| https://github.com/nats-io/nats-server/commit/2ae… | x_refsource_MISC |
| https://github.com/nats-io/nats-server/commit/894… | x_refsource_MISC |
| https://github.com/nats-io/nats-server/releases/t… | x_refsource_MISC |
| https://github.com/nats-io/nats-server/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| nats-io | nats-server |
Affected:
< 2.12.12
Affected: >= 2.14.0-RC.1, < 2.14.3 |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-58207",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T14:21:06.599044Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T14:41:02.162Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "nats-server",
"vendor": "nats-io",
"versions": [
{
"status": "affected",
"version": "\u003c 2.12.12"
},
{
"status": "affected",
"version": "\u003e= 2.14.0-RC.1, \u003c 2.14.3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal arithmetic before the response window was safely bounded. This issue is fixed in versions 2.14.3 and 2.12.12."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190: Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-08T20:15:31.082Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2"
},
{
"name": "https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9"
},
{
"name": "https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3"
},
{
"name": "https://github.com/nats-io/nats-server/releases/tag/v2.12.12",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.12"
},
{
"name": "https://github.com/nats-io/nats-server/releases/tag/v2.14.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.3"
}
],
"source": {
"advisory": "GHSA-q59r-vq66-pxc2",
"discovery": "UNKNOWN"
},
"title": "NATS Server: Remote crash via integer overflow in Connz pagination"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-58207",
"datePublished": "2026-07-08T20:15:31.082Z",
"dateReserved": "2026-06-29T17:09:25.872Z",
"dateUpdated": "2026-07-09T14:41:02.162Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-58207",
"date": "2026-11-01",
"epss": "0.0056",
"percentile": "0.4665"
},
"microsoft_vex": {
"current_release_date": "2026-10-22T01:15:54.000Z",
"cve": "CVE-2026-58207",
"id": "msrc_CVE-2026-58207",
"initial_release_date": "2026-07-11T01:07:49.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "NATS Server: Remote crash via integer overflow in Connz pagination",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-58207.json",
"version": "3"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "nats-server",
"vendor": "nats-io",
"versions": [
{
"status": "affected",
"version": "\u003c 2.12.12"
},
{
"status": "affected",
"version": "\u003e= 2.14.0-RC.1, \u003c 2.14.3"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "410EBCA5-133B-48F5-BF7D-53F8BC020506",
"versionEndExcluding": "2.12.12",
"versionStartIncluding": "2.12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9BF70729-64AF-4219-BC35-3C5C042F0595",
"versionEndExcluding": "2.14.3",
"versionStartIncluding": "2.14.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal arithmetic before the response window was safely bounded. This issue is fixed in versions 2.14.3 and 2.12.12."
},
{
"lang": "es",
"value": "NATS Server es un servidor de alto rendimiento para NATS.io, el sistema de mensajer\u00eda nativo de la nube y del borde. Antes de las versiones 2.14.3 y 2.12.12, un cliente capaz de enviar solicitudes de monitoreo de conexi\u00f3n con \u00e1mbito de cuenta podr\u00eda bloquear el servidor al proporcionar valores de Offset y Limit de paginaci\u00f3n de Connz que desbordaban la aritm\u00e9tica interna antes de que la ventana de respuesta estuviera acotada de forma segura. Este problema est\u00e1 solucionado en las versiones 2.14.3 y 2.12.12."
}
],
"id": "CVE-2026-58207",
"lastModified": "2026-10-25T17:10:00.197",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.1,
"impactScore": 4.0,
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-58207",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T14:21:06.599044Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-08T21:16:52.293",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.12"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.3"
},
{
"source": "security-advisories@github.com",
"tags": [
"Mitigation",
"Vendor Advisory"
],
"url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-190"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-10T13:46:03+00:00",
"cve": "CVE-2026-58207",
"id": "CVE-2026-58207",
"initial_release_date": "2026-07-08T20:15:31.082000+00:00",
"product_status:known_affected": "6",
"product_status:known_not_affected": "3",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "github.com/nats-io/nats-server: NATS Server: Denial of Service via arithmetic overflow in connection monitoring pagination",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-58207.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-58207",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T14:21:06.599044Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T14:21:07.274Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "nats-server",
"vendor": "nats-io",
"versions": [
{
"status": "affected",
"version": "\u003c 2.12.12"
},
{
"status": "affected",
"version": "\u003e= 2.14.0-RC.1, \u003c 2.14.3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pagination Offset and Limit values that overflowed internal arithmetic before the response window was safely bounded. This issue is fixed in versions 2.14.3 and 2.12.12."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190: Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-08T20:15:31.082Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/nats-io/nats-server/security/advisories/GHSA-q59r-vq66-pxc2"
},
{
"name": "https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/commit/2ae047139e37a38cb01e259a67909e7a39fa38e9"
},
{
"name": "https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/commit/894d9411927681d66ce349bf1afe49608dc0c1a3"
},
{
"name": "https://github.com/nats-io/nats-server/releases/tag/v2.12.12",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/releases/tag/v2.12.12"
},
{
"name": "https://github.com/nats-io/nats-server/releases/tag/v2.14.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nats-io/nats-server/releases/tag/v2.14.3"
}
],
"source": {
"advisory": "GHSA-q59r-vq66-pxc2",
"discovery": "UNKNOWN"
},
"title": "NATS Server: Remote crash via integer overflow in Connz pagination"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-58207",
"datePublished": "2026-07-08T20:15:31.082Z",
"dateReserved": "2026-06-29T17:09:25.872Z",
"dateUpdated": "2026-07-08T20:15:31.082Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
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.