Quick answers
- Is CVE-2026-59156 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-59156 being exploited in the wild.
- How severe is CVE-2026-59156?
- Medium severity, with a CVSS score of 6.5, published 18 September 2026.
- Which products and versions are affected?
- Academy Software Foundation OpenImageIO before 3.0.20.0, before 3.1.15.0, before 3.2.0.3-beta1.
- Is there a fix for CVE-2026-59156?
- A patch was published on 2026-06-20: Fix committed to main branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-59156 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-59156?
- Check whether you run Academy Software Foundation OpenImageIO 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
The vulnerability is a stack overflow caused by unbounded recursion in FitsInput::read_fits_header() when parsing FITS files with many consecutive 2880-byte header blocks lacking the mandatory END keyword. An attacker can supply a malicious FITS file that exhausts the application stack through recursive parsing calls. The fix converts the recursive implementation to an iterative loop with a maximum limit of 10,000 header blocks.
Affected products
- Academy Software Foundation OpenImageIO before 3.0.20.0, before 3.1.15.0, before 3.2.0.3-beta1
Timeline
- 2026-09-18: disclosed
- 2026-06-20: patched: Fix committed to main branch