CVE-2026-35458

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.29.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "gotenberg", "source": "cna", "vendor": "gotenberg"}, "product": "gotenberg", "vendor": "gotenberg"}], "analysis": {"en": {"generated_at": "2026-04-14T21:44:52.726514+00:00", "value": {"mitigation_remediation": ["Upgrade Gotenberg to version 8.30.0 or later, which removes the vulnerable regex usage.", "If an immediate upgrade is not possible, disable any API endpoints that allow user\u2011defined scope patterns until a patch is applied.", "Monitor worker process health and restart the service when a hang is detected.", "Apply input validation or rate limiting to restrict complex regex payloads sent to the API."], "summary": {"action": "Patch Immediately", "impact": "Denial of Service via Regex Exhaustion"}, "threat_synthesis": {"affected_systems": "The issue exists in Gotenberg version 8.29.1 and earlier. Gotenberg is an open\u2011source API used for document format conversion, and the affected component is the dlclark/regexp2 library used to parse scope patterns for features such as extraHttpHeaders. The vendor product is Gotenberg by thecodingmachine.", "description_and_impact": "The vulnerability is a regular expression denial of service (ReDoS) that occurs when Gotenberg compiles user-supplied scope patterns without a timeout. Attackers can provide specially crafted patterns that cause the regex engine to enter exponential backtracking, causing worker processes to hang indefinitely. This results in denial of service to all clients of the API, consuming CPU and possibly memory resources. The weakness is reflected in CWE-1333, a regex\u2011based denial of service.", "risk_and_exploitability": "The CVSS base score of 8.7 marks the bug as high severity. According to the EPSS data, the probability of exploitation is currently below 1%, and the vulnerability is not listed in the CISA KEV catalog. However, the likely attack vector is remote, exploiting the HTTP API that accepts scope patterns. The attacker would need valid access to the API endpoint and supply a malicious regex; the lack of a timeout allows the worker to be hung until manually restarted."}}}}, "created": "2026-04-08T19:37:31.888122+00:00", "updated": "2026-04-15T16:30:09.725182+00:00", "vendors": ["gotenberg", "gotenberg$PRODUCT$gotenberg"]}