High 7.8Published Oct 22, 2026

CVE-2026-115504CFITSIO through 4.7.0 Out-of-Bounds Write via ffgcls2 in getcols.c

Updated under an hour ago (Oct 28, 2026, 3:00 AM ET)

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It affects HEASARC cfitsio. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.13%, higher than 3% of scored CVEs.

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Every CVE for HEASARC cfitsio

Exploited in the last 30 days

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 overflows a fixed 28,800-byte stack buffer and the caller's string array, enabling arbitrary code execution.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.13% (percentile 3)
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 22, 2026
First seen by InfoSec Signals: Oct 22, 2026

Affected products

Affected products

HEASARC cfitsio heasarc:cfitsio (from the name)	through 4.7.0	CNA record

References

References

https://gist.github.com/yure1432/98f15c7e8f48dc90ae65646f926aa176	technical-description, exploit
https://github.com/HEASARC/cfitsio/pull/184	patch, issue-tracking
https://github.com/HEASARC/cfitsio/commit/579792e0f85bff0c6733ad5ebdf54c3b5c188686	patch
https://github.com/HEASARC/cfitsio	product
https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-out-of-bounds-write-via-ffgcls2-in-getcols-c	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.