# CVE-2026-59145: EGOR Data::Intern::Shared out-of-bounds read in si_idx_find

Source: https://junglewise.ai/threats/cve-2026-59145-egor-data-intern-shared-out-of-bounds-read-in-si-idx-find  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-21. Updated: 2026-07-21  
License: CC BY 4.0 with a link back

CVE-2026-59145 · Severity: info · CVSS 0 · Published 2026-07-21

Data::Intern::Shared is a Perl module used for sharing string data between different processes. A security flaw allows a local user who can modify the shared data file to trigger an out-of-bounds memory read. This could allow an attacker to access sensitive information from the memory of other programs using the same shared data.

Vendors: [EGOR Data](https://junglewise.ai/threats/vendors/egor-data).

## Quick answers

**Is CVE-2026-59145 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-59145 being exploited in the wild.

**How severe is CVE-2026-59145?** Informational severity, with a CVSS score of 0, published 21 July 2026.

**Which products and versions are affected?** EGOR Data Intern::Shared before 0.02.

**Is there a fix for CVE-2026-59145?** 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-2026-59145 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-59145?** Check whether you run EGOR Data Intern::Shared 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

An out-of-bounds read vulnerability exists in the si_idx_find function of Data::Intern::Shared due to insufficient validation of indices within mmap'd segments. While si_validate_header checks basic layout parameters, it fails to validate the slot, reverse, and arena arrays. A local attacker with write access to the backing file can poison these indices to cause triple indirection dereferences outside of the allocated memory bounds. This can be exploited via id_of, intern, or string lookups to disclose adjacent process memory. The issue is addressed in version 0.02.

## Affected products

- EGOR Data::Intern::Shared before 0.02

## Timeline

- 2026-07-21: advisory
- 2026-07-21: disclosed

## References

- [https://cpan.org/modules](https://cpan.org/modules)
- [https://metacpan.org/release/EGOR/Data-Intern-Shared-0.02/changes](https://metacpan.org/release/EGOR/Data-Intern-Shared-0.02/changes)
- [https://metacpan.org/release/EGOR/Data-Intern-Shared-0.02/diff/EGOR/Data-Intern-Shared-0.01](https://metacpan.org/release/EGOR/Data-Intern-Shared-0.02/diff/EGOR/Data-Intern-Shared-0.01)