Is CVE-2026-111124 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-111124 being exploited in the wild.

How severe is CVE-2026-111124?

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

Is there a fix for CVE-2026-111124?

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-2026-111124 attacked?

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

Am I affected by CVE-2026-111124?

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-2026-111124: CFITSIO heap-based out-of-bounds read in imcompress

CVE-2026-111124 · Severity: medium · CVSS 6.1 · Published 2026-10-15

CFITSIO is a library used by scientific software to read and write astronomical FITS image files. A vulnerability in its image compression code allows attackers to craft a malicious FITS file that triggers a heap memory read out-of-bounds, potentially crashing applications or leaking sensitive data from memory when the file is opened and processed.

Technologies: HEASARC CFITSIO. Vendors: HEASARC.

Quick answers

Is CVE-2026-111124 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-111124 being exploited in the wild.
How severe is CVE-2026-111124?: 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-2026-111124?: 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-2026-111124 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-111124?: 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 imcompress.c unquantize helpers when processing FITS files with SUBTRACTIVE_DITHER_1 compression and a zero or negative ZDITHER0 seed value. The vulnerability is triggered via fits_open_file() and fits_read_pix() when reading a specially crafted FITS file, allowing attackers to read memory before the fits_rand_value table, resulting in crashes or heap content disclosure.

Affected products

HEASARC CFITSIO through 4.7.0

Timeline

2026-10-15: disclosed

References

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