{"id":"CVE-2026-115504","title":"CFITSIO through 4.7.0 Out-of-Bounds Write via ffgcls2 in getcols.c","summary":"CFITSIO through 4.7.0 contains an out-of-bounds write vulnerability in ffgcls2() in getcols.c that trusts attacker-controlled heap descriptor lengths for variable-length string columns. Attackers can supply a crafted FITS file that overf…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"HEASARC","product":"cfitsio","affected":["cfitsio <= 4.7.0"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:14:04.552Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115504","references":[{"url":"https://gist.github.com/yure1432/98f15c7e8f48dc90ae65646f926aa176"},{"url":"https://github.com/HEASARC/cfitsio/pull/184"},{"url":"https://github.com/HEASARC/cfitsio/commit/579792e0f85bff0c6733ad5ebdf54c3b5c188686"},{"url":"https://github.com/HEASARC/cfitsio"},{"url":"https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-out-of-bounds-write-via-ffgcls2-in-getcols-c","label":"VulnCheck Advisory: CFITSIO through 4.7.0 Out-of-Bounds Write via ffgcls2 in getcols.c"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.410Z","slug":"CVE-2026-115504","body":"## Overview\n\nCFITSIO through 4.7.0 contains an out-of-bounds write vulnerability in ffgcls2() in getcols.c that trusts attacker-controlled heap descriptor lengths for variable-length string columns. Attackers can supply a crafted FITS file that overflows a fixed 28,800-byte stack buffer and the caller's string array, enabling arbitrary code execution.\n\n## Affected\n\n- `cfitsio <= 4.7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}