CVE-2026-115504highCWE-787

CVE-2026-115504: high-severity vulnerability in HEASARC cfitsio

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

Published

38Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.5
exploitation probability
—
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
HEASARC · cfitsio
public PoCs found — 1
cve_referencegist.github.com/yure1432/98f15c7e8f48dc90ae65646f926aa176unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — HEASARC cfitsio

In the same product, most dangerous first.

CVE-2026-111125MEDIUMCFITSIO through 4.7.0 Heap Out-of-Bounds Read via HCOMPRESS input_nnybbleEPSS 0.2%CVE-2026-111124MEDIUMCFITSIO through 4.7.0 Heap Out-of-Bounds Read via Negative ZDITHER0 SeedEPSS 0.2%
References
https://gist.github.com/yure1432/98f15c7e8f48dc90ae65646f926aa176https://github.com/HEASARC/cfitsiohttps://github.com/HEASARC/cfitsio/commit/579792e0f85bff0c6733ad5ebdf54c3b5c188686https://github.com/HEASARC/cfitsio/pull/184https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-out-of-bounds-write-via-ffgcls2-in-getcols-c