CVE-2026-27614

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{"affected": [{"affectedData": [{"product": "bugsink", "vendor": "bugsink", "versions": [{"status": "affected", "version": "< 2.0.13"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:bugsink:bugsink:*:*:*:*:*:*:*:*", "matchCriteriaId": "97568C00-5B15-484D-B081-39D276B6F579", "versionEndExcluding": "2.0.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Bugsink is a self-hosted error tracking tool. In versions prior to 2.0.13, an unauthenticated attacker who can submit events to a Bugsink project can store arbitrary JavaScript in an event. The payload executes only if a user explicitly views the affected Stacktrace in the web UI. When Pygments returns more lines than it was given (a known upstream quirk that triggers with Ruby heredoc-style input), `_pygmentize_lines()` in `theme/templatetags/issues.py:75-77` falls back to returning the raw input lines. `mark_safe()` at line 111-113 is then applied unconditionally - including to those unsanitized raw lines. Since DSN endpoints are public by Sentry protocol, no account is needed to inject. The payload sits in the database until an admin looks at the event. Successful exploitation requires that the attacker to be able to submit events to the project (i.e. knows the DSN or can access a client that uses it), the Bugsink ingest endpoint is reachable to the attacker, and an administrator explicitly views the crafted event in the UI. Under those conditions, the attacker can execute JavaScript in the administrator\u2019s browser and act with that user\u2019s privileges within Bugsink. Version 2.0.13 fixes the vulnerability."}, {"lang": "es", "value": "Bugsink es una herramienta de seguimiento de errores autoalojada. En versiones anteriores a la 2.0.13, un atacante no autenticado que puede enviar eventos a un proyecto de Bugsink puede almacenar JavaScript arbitrario en un evento. La carga \u00fatil se ejecuta solo si un usuario ve expl\u00edcitamente el Stacktrace afectado en la interfaz de usuario web. Cuando Pygments devuelve m\u00e1s l\u00edneas de las que se le dieron (una peculiaridad conocida de la fuente que se activa con entrada de estilo heredoc de Ruby), '_pygmentize_lines()' en 'theme/templatetags/issues.py:75-77' recurre a devolver las l\u00edneas de entrada sin procesar. 'mark_safe()' en las l\u00edneas 111-113 se aplica entonces incondicionalmente, incluso a esas l\u00edneas sin procesar no saneadas. Dado que los endpoints DSN son p\u00fablicos seg\u00fan el protocolo Sentry, no se necesita una cuenta para inyectar. La carga \u00fatil permanece en la base de datos hasta que un administrador mira el evento. Para explotarlo con \u00e9xito es preciso que el atacante pueda enviar eventos al proyecto (es decir, conozca el DSN o pueda acceder a un cliente que lo use), que el punto final de ingesta de Bugsink sea accesible para el atacante, y que un administrador vea expl\u00edcitamente el evento manipulado en la interfaz de usuario. Bajo esas condiciones, el atacante puede ejecutar JavaScript en el navegador del administrador y actuar con los privilegios de ese usuario dentro de Bugsink. La versi\u00f3n 2.0.13 corrige la vulnerabilidad."}], "id": "CVE-2026-27614", "lastModified": "2026-06-17T10:27:23.907", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27614", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-25T20:01:19.421972Z", "version": "2.0.3"}}]}, "published": "2026-02-25T03:16:05.803", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/bugsink/bugsink/commit/e784d6aeb0d5f29b40c2779d2544c2b9ef097ee9"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/bugsink/bugsink/releases/tag/2.0.13"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/bugsink/bugsink/security/advisories/GHSA-vp6q-7m36-pq3w"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.0.13)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "bugsink", "source": "cna", "vendor": "bugsink"}, "product": "bugsink", "vendor": "bugsink"}], "analysis": {"en": {"generated_at": "2026-04-17T15:30:25.589400+00:00", "value": {"mitigation_remediation": ["Upgrade Bugsink to version 2.0.13 or later, which removes the Pygments fallback and applies proper sanitization to stacktrace lines.", "If upgrading is not immediately possible, restrict the ingestion endpoint to trusted IP ranges or internal networks to prevent unauthenticated or malicious event submissions.", "Rotate or revoke the DSN keys when the ingestion endpoint restriction is not feasible, and ensure that only authorized clients use the remaining keys."], "summary": {"action": "Immediate Patch", "impact": "Stored XSS allowing an attacker to execute arbitrary JavaScript in the administrator\u2019s browser within Bugsink"}, "threat_synthesis": {"affected_systems": "All Bugsink installations running a version earlier than 2.0.13 are affected. The issue is present in the Bugsink Bugsink product, and no specific operating system or deployment environment is required beyond the ability to host Bugsink and expose the ingest endpoint. Deployments that use the public DSN endpoint for event submission are vulnerable because no authentication is needed to upload events.", "description_and_impact": "Bugsink stores an attacker\u2019s JavaScript payload in an event when the event is submitted to a public ingestion endpoint. The payload is delivered unescaped when a stacktrace is rendered because a known Pygments quirk causes raw lines to be returned and then marked safe. An attacker cannot directly exploit the vulnerability, but the stored code runs in the context of an administrator who explicitly views the event in the web UI, granting the attacker the administrator\u2019s privileges within Bugsink.", "risk_and_exploitability": "The CVSS score of 9.3 indicates a severe vulnerability with full impact on confidentiality, integrity and availability. The EPSS score is less than 1%, so current exploitation likelihood is very low; however, the exploitation path is simple: an attacker must know or obtain the DSN back\u2011end, submit an event containing malicious code, and wait until an administrator opens the event in the UI. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog, but the high score warrants rapid remediation. The attack vector is remote and requires only public access to the ingestion endpoint, which is normally open for third\u2011party clients."}}}}, "created": "2026-02-25T11:35:00.509314+00:00", "updated": "2026-04-17T15:45:15.879995+00:00", "vendors": ["bugsink", "bugsink$PRODUCT$bugsink"]}