CVE-2026-61898

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "accountsservice", "platforms": ["Ubuntu 14.04 LTS", "Ubuntu 16.04 LTS", "Ubuntu 18.04 LTS", "Ubuntu 20.04 LTS", "Ubuntu 22.04 LTS", "Ubuntu 24.04 LTS", "Ubuntu 26.04 LTS", "Ubuntu 26.10"], "product": "accountsservice", "vendor": "Canonical", "versions": [{"lessThan": "22.07.5-2ubuntu1.6", "status": "affected", "version": "22.07.5-2ubuntu1", "versionType": "dpkg"}, {"lessThan": "23.13.9-2ubuntu6.1", "status": "affected", "version": "23.13.9-2ubuntu6", "versionType": "dpkg"}, {"lessThan": "23.13.9-8ubuntu5.2", "status": "affected", "version": "23.13.9-8ubuntu5", "versionType": "dpkg"}, {"lessThan": "23.13.9-8ubuntu7", "status": "affected", "version": "23.13.9-8ubuntu6", "versionType": "dpkg"}]}], "source": "security@ubuntu.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Ubuntu-specific language helper scripts (save-to-pam-env, update-langlist) shipped with accountsservice before 23.13.9-8ubuntu7 treat the user-controlled LANGUAGE entry in ~/.pam_environment as trusted input. The value is interpolated unescaped into a GNU sed replacement expression, allowing an attacker to inject a sed 'e' flag and arbitrary shell commands that execute with the privileges of the AccountsService helper process (real UID 0) via the SetLanguage D-Bus method."}, {"lang": "es", "value": "Los scripts auxiliares de idioma espec\u00edficos de Ubuntu (save-to-pam-env, update-langlist) incluidos con accountsservice antes de la versi\u00f3n 23.13.9-8ubuntu7 tratan la entrada LANGUAGE controlada por el usuario en ~/.pam_environment como entrada de confianza. El valor se interpola sin escapar en una expresi\u00f3n de reemplazo de GNU sed, permitiendo a un atacante inyectar una bandera 'e' de sed y comandos de shell arbitrarios que se ejecutan con los privilegios del proceso auxiliar de AccountsService (UID real 0) a trav\u00e9s del m\u00e9todo D-Bus SetLanguage."}], "id": "CVE-2026-61898", "lastModified": "2026-10-18T20:10:00.110", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security@ubuntu.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-61898", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T19:43:44.504304Z", "version": "2.0.3"}}]}, "published": "2026-08-20T15:17:38.913", "references": [{"source": "security@ubuntu.com", "url": "https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985"}, {"source": "security@ubuntu.com", "url": "https://ubuntu.com/security/CVE-2026-61898"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{"bugzilla": {"description": "accountsservice: accountsservice: Arbitrary code execution via shell injection", "id": "2520354", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520354"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-78", "details": ["A flaw was found in accountsservice. A local attacker can exploit this by injecting arbitrary shell commands into the user-controlled LANGUAGE entry in the ~/.pam_environment file. The Ubuntu-specific language helper scripts process this input unescaped, leading to arbitrary code execution with root privileges via the SetLanguage D-Bus method."], "name": "CVE-2026-61898", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "accountsservice", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "accountsservice", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "accountsservice", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "accountsservice", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-20T14:32:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-61898\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-61898\nhttps://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985\nhttps://ubuntu.com/security/CVE-2026-61898"], "statement": "This Important vulnerability in `accountsservice` is specific to Ubuntu's language helper scripts. Red Hat products do not utilize these particular scripts, therefore, this flaw does not affect Red Hat Enterprise Linux or its supported derivatives.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": ["ubuntu_14.04_lts", "ubuntu_16.04_lts", "ubuntu_18.04_lts", "ubuntu_20.04_lts", "ubuntu_22.04_lts", "ubuntu_24.04_lts", "ubuntu_26.04_lts", "ubuntu_26.10"], "status": "affected", "versions": {"scheme": "semver", "value": "[22.07.5-2ubuntu1,22.07.5-2ubuntu1.6)"}}, {"platform": ["ubuntu_14.04_lts", "ubuntu_16.04_lts", "ubuntu_18.04_lts", "ubuntu_20.04_lts", "ubuntu_22.04_lts", "ubuntu_24.04_lts", "ubuntu_26.04_lts", "ubuntu_26.10"], "status": "affected", "versions": {"scheme": "semver", "value": "[23.13.9-2ubuntu6,23.13.9-2ubuntu6.1)"}}, {"platform": ["ubuntu_14.04_lts", "ubuntu_16.04_lts", "ubuntu_18.04_lts", "ubuntu_20.04_lts", "ubuntu_22.04_lts", "ubuntu_24.04_lts", "ubuntu_26.04_lts", "ubuntu_26.10"], "status": "affected", "versions": {"scheme": "semver", "value": "[23.13.9-8ubuntu5,23.13.9-8ubuntu5.2)"}}, {"platform": ["ubuntu_14.04_lts", "ubuntu_16.04_lts", "ubuntu_18.04_lts", "ubuntu_20.04_lts", "ubuntu_22.04_lts", "ubuntu_24.04_lts", "ubuntu_26.04_lts", "ubuntu_26.10"], "status": "affected", "versions": {"scheme": "semver", "value": "[23.13.9-8ubuntu6,23.13.9-8ubuntu7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "accountsservice", "source": "cna", "vendor": "Canonical"}, "product": "accountsservice", "vendor": "canonical"}], "created": "2026-08-20T15:45:03.232242+00:00", "updated": "2026-08-20T21:15:05.464723+00:00", "vendors": ["canonical", "canonical$PRODUCT$accountsservice"]}