Is CVE-2026-111125 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-111125 being exploited in the wild.

How severe is CVE-2026-111125?

Medium severity, with a CVSS score of 6.1, published 15 October 2026.

Is there a fix for CVE-2026-111125?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-111125 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-111125?

Check whether you run HEASARC CFITSIO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-111125: CFITSIO heap-based out-of-bounds read in HCOMPRESS decoder

CVE-2026-111125 · Severity: medium · CVSS 6.1 · Published 2026-10-15

CFITSIO is a C and Fortran library used to read and write FITS astronomical data files. A heap-based out-of-bounds read vulnerability in the HCOMPRESS tile decoder allows attackers to crash applications or disclose heap memory contents by supplying a crafted FITS file. This could affect any application using CFITSIO to process untrusted FITS files.

Technologies: HEASARC CFITSIO. Vendors: HEASARC.

Quick answers

Is CVE-2026-111125 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-111125 being exploited in the wild.
How severe is CVE-2026-111125?: Medium severity, with a CVSS score of 6.1, published 15 October 2026.
Which products and versions are affected?: HEASARC CFITSIO through 4.7.0.
Is there a fix for CVE-2026-111125?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-111125 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-111125?: Check whether you run HEASARC CFITSIO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based out-of-bounds read exists in the HCOMPRESS tile decoder via the input_nnybble function in fits_hdecompress.c. An attacker can supply a crafted FITS file with ZCMPTYPE HCOMPRESS_1 that declares oversized tile geometry to trigger the vulnerability when applications call fits_read_pix, causing a crash (denial of service) or limited heap memory disclosure.

Affected products

HEASARC CFITSIO through 4.7.0

Timeline

2026-10-15: disclosed

References

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