CVE-2021-39938
Estado: ModificadaMedia (6.5)—
Un patrón de expresión regular vulnerable en GitLab CE/EE desde la versión 8.15 anteriores a 14.3.6, todas las versiones a partir de 14.4 anteriores a 14.4.4, todas las versiones a partir de 14.5 anteriores a 14.5.2, permite a un atacante causar un consumo no controlado de recursos que conduzca a una denegación de servicio por medio de comandos deploy Slash especialmente diseñados
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 6.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.92%
- Percentil entre todas las CVEs puntuadas: 59
- Fecha de la puntuación: 8/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-400
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-39938",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 4,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
"authentication": "SINGLE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "cve@gitlab.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 3.1,
"attackVector": "NETWORK",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "LOW",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"exploitabilityScore": 1.6
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.5,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "cve@gitlab.com",
"affectedData": [
{
"vendor": "GitLab",
"product": "GitLab",
"versions": [
{
"status": "affected",
"version": ">=14.5, <14.5.2"
},
{
"status": "affected",
"version": ">=14.4, <14.4.4"
},
{
"status": "affected",
"version": ">=8.15, <14.3.6"
}
]
}
]
}
],
"published": "2021-12-13T16:15:09.567",
"references": [
{
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39938.json",
"tags": [
"Third Party Advisory"
],
"source": "cve@gitlab.com"
},
{
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/344873",
"tags": [
"Broken Link"
],
"source": "cve@gitlab.com"
},
{
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39938.json",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/344873",
"tags": [
"Broken Link"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-400"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerable regular expression pattern in GitLab CE/EE since version 8.15 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows an attacker to cause uncontrolled resource consumption leading to Denial of Service via specially crafted deploy Slash commands"
},
{
"lang": "es",
"value": "Un patrón de expresión regular vulnerable en GitLab CE/EE desde la versión 8.15 anteriores a 14.3.6, todas las versiones a partir de 14.4 anteriores a 14.4.4, todas las versiones a partir de 14.5 anteriores a 14.5.2, permite a un atacante causar un consumo no controlado de recursos que conduzca a una denegación de servicio por medio de comandos deploy Slash especialmente diseñados"
}
],
"lastModified": "2026-06-17T04:04:27.747",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
"vulnerable": true,
"matchCriteriaId": "332B8CE2-A920-47D2-957E-224551893BCF",
"versionEndExcluding": "14.3.6",
"versionStartIncluding": "8.15.0"
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AE379EBC-5C73-42E2-AE2E-EDF3C4A45AE1",
"versionEndExcluding": "14.3.6",
"versionStartIncluding": "8.15.0"
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1E801B5F-9C94-4CB2-89ED-D071E567132C",
"versionEndExcluding": "14.4.4",
"versionStartIncluding": "14.4.0"
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7C38F838-02EA-4E2F-8493-57DD401EF911",
"versionEndExcluding": "14.4.4",
"versionStartIncluding": "14.4.0"
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
"vulnerable": true,
"matchCriteriaId": "95F59DF7-707C-4C43-8352-8115DAF1C533",
"versionEndExcluding": "14.5.2",
"versionStartIncluding": "14.5.0"
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
"vulnerable": true,
"matchCriteriaId": "64F26CC0-C99A-4748-963B-944F39E4B647",
"versionEndExcluding": "14.5.2",
"versionStartIncluding": "14.5.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@gitlab.com"
}