CVE-2026-19243 (GCVE-0-2026-19243)
Vulnerability from cvelistv5
Published
2026-08-07 19:30
Modified
2026-08-11 01:10
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A security vulnerability has been detected in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component Shell Allowlist Handler. Such manipulation leads to os command injection. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.3.0 is recommended to address this issue. The name of the patch is 4562. It is advisable to upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: "These five reports are variants of the same root cause: validation of shell commands containing multiple segments, wrappers, comments, or chained commands. The issue was fixed by validating every executable shell segment against the configured allowlist".
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-19243",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-11T01:10:00.887794Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-11T01:10:10.998Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:nanobot:nanobot:*:*:*:*:*:*:*:*"
],
"modules": [
"Shell Allowlist Handler"
],
"product": "nanobot",
"vendor": "HKUDS",
"versions": [
{
"status": "affected",
"version": "0.2.0"
},
{
"status": "affected",
"version": "0.2.1"
},
{
"status": "unaffected",
"version": "0.3.0"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Eric-c (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A security vulnerability has been detected in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component Shell Allowlist Handler. Such manipulation leads to os command injection. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.3.0 is recommended to address this issue. The name of the patch is 4562. It is advisable to upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: \"These five reports are variants of the same root cause: validation of shell commands containing multiple segments, wrappers, comments, or chained commands. The issue was fixed by validating every executable shell segment against the configured allowlist\"."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 6.5,
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-78",
"description": "OS Command Injection",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-77",
"description": "Command Injection",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-07T19:30:13.316Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-386997 | HKUDS nanobot Shell Allowlist shell.py ExecTool._spawn os command injection",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/386997"
},
{
"name": "VDB-386997 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/386997/cti"
},
{
"name": "CVE-2026-19243 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-19243"
},
{
"name": "Submit #865112 | HKUDS nanobot 0.2.1 OS Command Injection via Allowlist Bypass (CWE-78)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/865112"
},
{
"name": "Submit #865114 | HKUDS nanobot 0.2.1 Command Injection via Comment-Tail Allowlist Bypass (CWE-88) (Duplicate)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/865114"
},
{
"name": "Submit #865115 | HKUDS nanobot 0.2.1 Allowlist Bypass via Wrapper Prefix (CWE-184) (Duplicate)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/865115"
},
{
"name": "Submit #865119 | HKUDS nanobot 0.2.1 Allowlist Bypass Leading to Command Execution (CWE-184) (Duplicate)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/865119"
},
{
"name": "Submit #865121 | HKUDS nanobot 0.2.1 Command Injection via Shell-Chain Allowlist Bypass (CWE-88) (Duplicate)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/865121"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/HKUDS/nanobot/issues/4521"
},
{
"tags": [
"exploit"
],
"url": "https://gist.github.com/YLChen-007/8fcbf8e49e7be568e1a92e9e0414fdba"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/HKUDS/nanobot/pull/4562"
},
{
"tags": [
"patch"
],
"url": "https://github.com/HKUDS/nanobot/releases/tag/v0.3.0"
},
{
"tags": [
"product"
],
"url": "https://github.com/HKUDS/nanobot/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-08-07T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-08-07T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-08-07T14:12:07.000Z",
"value": "VulDB entry last update"
}
],
"title": "HKUDS nanobot Shell Allowlist shell.py ExecTool._spawn os command injection",
"x_generator": [
"VulDB PVTS v202608"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-19243",
"datePublished": "2026-08-07T19:30:13.316Z",
"dateReserved": "2026-08-07T12:06:59.355Z",
"dateUpdated": "2026-08-11T01:10:10.998Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-19243\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-11T01:10:00.887794Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-11T01:10:07.413Z\"}}], \"cna\": {\"title\": \"HKUDS nanobot Shell Allowlist shell.py ExecTool._spawn os command injection\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Eric-c (VulDB User)\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"VulDB CNA Team\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 6.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 6.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 6.5, \"vectorString\": \"AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C\"}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:nanobot:nanobot:*:*:*:*:*:*:*:*\"], \"vendor\": \"HKUDS\", \"modules\": [\"Shell Allowlist Handler\"], \"product\": \"nanobot\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.2.0\"}, {\"status\": \"affected\", \"version\": \"0.2.1\"}, {\"status\": \"unaffected\", \"version\": \"0.3.0\"}]}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-08-07T00:00:00.000Z\", \"value\": \"Advisory disclosed\"}, {\"lang\": \"en\", \"time\": \"2026-08-07T02:00:00.000Z\", \"value\": \"VulDB entry created\"}, {\"lang\": \"en\", \"time\": \"2026-08-07T14:12:07.000Z\", \"value\": \"VulDB entry last update\"}], \"references\": [{\"url\": \"https://vuldb.com/vuln/386997\", \"name\": \"VDB-386997 | HKUDS nanobot Shell Allowlist shell.py ExecTool._spawn os command injection\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/vuln/386997/cti\", \"name\": \"VDB-386997 | CTI Indicators (IOB, IOC, TTP, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/cve/CVE-2026-19243\", \"name\": \"CVE-2026-19243 | CVE Analysis and Report\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/865112\", \"name\": \"Submit #865112 | HKUDS nanobot 0.2.1 OS Command Injection via Allowlist Bypass (CWE-78)\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/865114\", \"name\": \"Submit #865114 | HKUDS nanobot 0.2.1 Command Injection via Comment-Tail Allowlist Bypass (CWE-88) (Duplicate)\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/865115\", \"name\": \"Submit #865115 | HKUDS nanobot 0.2.1 Allowlist Bypass via Wrapper Prefix (CWE-184) (Duplicate)\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/865119\", \"name\": \"Submit #865119 | HKUDS nanobot 0.2.1 Allowlist Bypass Leading to Command Execution (CWE-184) (Duplicate)\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/865121\", \"name\": \"Submit #865121 | HKUDS nanobot 0.2.1 Command Injection via Shell-Chain Allowlist Bypass (CWE-88) (Duplicate)\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/HKUDS/nanobot/issues/4521\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://gist.github.com/YLChen-007/8fcbf8e49e7be568e1a92e9e0414fdba\", \"tags\": [\"exploit\"]}, {\"url\": \"https://github.com/HKUDS/nanobot/pull/4562\", \"tags\": [\"issue-tracking\", \"patch\"]}, {\"url\": \"https://github.com/HKUDS/nanobot/releases/tag/v0.3.0\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/HKUDS/nanobot/\", \"tags\": [\"product\"]}], \"x_generator\": [\"VulDB PVTS v202608\"], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A security vulnerability has been detected in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component Shell Allowlist Handler. Such manipulation leads to os command injection. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.3.0 is recommended to address this issue. The name of the patch is 4562. It is advisable to upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: \\\"These five reports are variants of the same root cause: validation of shell commands containing multiple segments, wrappers, comments, or chained commands. The issue was fixed by validating every executable shell segment against the configured allowlist\\\".\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-78\", \"description\": \"OS Command Injection\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-77\", \"description\": \"Command Injection\"}]}], \"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-08-07T19:30:13.316Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-19243\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-11T01:10:10.998Z\", \"dateReserved\": \"2026-08-07T12:06:59.355Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-08-07T19:30:13.316Z\", \"assignerShortName\": \"VulDB\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…