Is CVE-2026-59139 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-59139 being exploited in the wild.

How severe is CVE-2026-59139?

Informational severity, published 21 July 2026.

Which products and versions are affected?

EGOR Data ReqRep::Shared before 0.05.

Is there a fix for CVE-2026-59139?

A patch was published on 2026-07-21: Fixed in version 0.05 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-59139 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-59139?

Check whether you run EGOR Data ReqRep::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.

CVE-2026-59139: EGOR Data::ReqRep::Shared out-of-bounds read in reqrep_recv_locked

CVE-2026-59139 · Severity: info · Published 2026-07-21

Data::ReqRep::Shared is a Perl library used for shared memory communication between processes. A security flaw allows a local attacker with access to the library's backing file to trigger an out-of-bounds memory read. This could lead to the exposure of sensitive information from the application's memory or cause the application to crash, resulting in a denial of service.

Vendors: EGOR Data.

Quick answers

Is CVE-2026-59139 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-59139 being exploited in the wild.
How severe is CVE-2026-59139?: Informational severity, published 21 July 2026.
Which products and versions are affected?: EGOR Data ReqRep::Shared before 0.05.
Is there a fix for CVE-2026-59139?: A patch was published on 2026-07-21: Fixed in version 0.05 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-59139 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-59139?: Check whether you run EGOR Data ReqRep::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 Data::ReqRep::Shared before version 0.05 due to insufficient validation of memory offsets. The function reqrep_recv_locked performs a memcpy using an offset and length read directly from a memory-mapped (mmap'd) segment without verifying them against the actual arena capacity (req_arena_cap). A local attacker who can modify the backing file can poison these values while maintaining a valid header. When the process attempts to receive the request, it may read adjacent memory or crash. This issue is addressed in version 0.05.

Affected products

EGOR Data::ReqRep::Shared before 0.05

Timeline

2026-07-21: advisory
2026-07-21: disclosed
2026-07-21: patched: Fixed in version 0.05

References

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