{"apiVersion":"1.0","identifier":"CVE-2026-77220","description":"PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller-s dictionary string values with another caller-s data.","publishedAt":"2026-08-21T21:17:06","lastModifiedAt":"2026-08-24T20:17:20","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77220","cvssScore":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","epssProbability":0.00239,"riskScore":0.66,"affectedProduct":"PDFio","affectedVersions":"<1.6.5","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-77220","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-77220","en":"https://www.redsauce.net/en/cves/CVE-2026-77220","fr":"https://www.redsauce.net/fr/cves/CVE-2026-77220","pt":"https://www.redsauce.net/pt/cves/CVE-2026-77220","de":"https://www.redsauce.net/de/cves/CVE-2026-77220","sk":"https://www.redsauce.net/sk/cves/CVE-2026-77220","el":"https://www.redsauce.net/el/cves/CVE-2026-77220"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-77220"}}