onefetch through 2.28.1 writes repository information field values to the terminal without removing control characters, allowing terminal escape sequence injection. Attackers can embed ANSI/OSC escape sequences in project manifest version and name fields to manipulate terminal output, rewrite window titles, hide text, or trigger emulator-specific behavior when victims run onefetch.
PUBLISHED5.2CWE-150
onefetch through 2.28.1 Terminal Escape Sequence Injection
Problem type
Affected products
o2sh
onefetch
<= 2.28.1 - AFFECTED
References
GitHub Issue #1828
https://github.com/o2sh/onefetch/issues/1828
github.com
https://github.com/o2sh/onefetch/blob/9beb80329cf2e5bd784270f668139f0bafb48e2b/src/info/utils/info_field.rs#L43-L55
github.com
https://github.com/o2sh/onefetch/blob/9beb80329cf2e5bd784270f668139f0bafb48e2b/src/info/version.rs#L33-L35
github.com
https://github.com/o2sh/onefetch
VulnCheck Advisory: onefetch through 2.28.1 Terminal Escape Sequence Injection
https://www.vulncheck.com/advisories/onefetch-through-2.28.1-terminal-escape-sequence-injection
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-100866Click to expand
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-100866",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"dateUpdated": "2026-09-27T13:09:52.041Z",
"dateReserved": "2026-09-27T00:20:54.407Z",
"datePublished": "2026-09-27T13:09:52.041Z",
"state": "PUBLISHED"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"dateUpdated": "2026-09-27T13:09:52.041Z"
},
"datePublic": "2026-08-07T00:00:00.000Z",
"title": "onefetch through 2.28.1 Terminal Escape Sequence Injection",
"descriptions": [
{
"lang": "en",
"value": "onefetch through 2.28.1 writes repository information field values to the terminal without removing control characters, allowing terminal escape sequence injection. Attackers can embed ANSI/OSC escape sequences in project manifest version and name fields to manipulate terminal output, rewrite window titles, hide text, or trigger emulator-specific behavior when victims run onefetch."
}
],
"affected": [
{
"vendor": "o2sh",
"product": "onefetch",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "semver",
"lessThanOrEqual": "2.28.1"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Improper Neutralization of Escape, Meta, or Control Sequences",
"cweId": "CWE-150",
"type": "CWE"
}
]
}
],
"references": [
{
"url": "https://github.com/o2sh/onefetch/issues/1828",
"name": "GitHub Issue #1828",
"tags": [
"issue-tracking"
]
},
{
"url": "https://github.com/o2sh/onefetch/blob/9beb80329cf2e5bd784270f668139f0bafb48e2b/src/info/utils/info_field.rs#L43-L55",
"tags": [
"technical-description"
]
},
{
"url": "https://github.com/o2sh/onefetch/blob/9beb80329cf2e5bd784270f668139f0bafb48e2b/src/info/version.rs#L33-L35",
"tags": [
"technical-description"
]
},
{
"url": "https://github.com/o2sh/onefetch",
"tags": [
"product"
]
},
{
"url": "https://www.vulncheck.com/advisories/onefetch-through-2.28.1-terminal-escape-sequence-injection",
"name": "VulnCheck Advisory: onefetch through 2.28.1 Terminal Escape Sequence Injection",
"tags": [
"third-party-advisory"
]
}
],
"metrics": [
{
"format": "CVSS"
},
{
"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"availabilityImpact": "NONE",
"baseScore": 3.3,
"baseSeverity": "LOW"
}
}
],
"credits": [
{
"lang": "en",
"value": "George Chen",
"type": "finder"
}
]
}
}
}