# CVE-2026-14683: HdrHistogram uncontrolled memory allocation in AbstractHistogram

Source: https://junglewise.ai/threats/cve-2026-14683-hdrhistogram-uncontrolled-memory-allocation-in-abstracthistogram  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-04. Updated: 2026-07-04  
License: CC BY 4.0 with a link back

CVE-2026-14683 · Severity: low · CVSS 3.3 · Published 2026-07-04

HdrHistogram is a Java library used for recording and analyzing high-resolution data distributions, often used in performance monitoring. A flaw in how the library handles compressed data allows a local attacker to trigger excessive memory consumption. This can lead to an Out-of-Memory (OOM) error, causing the application using the library to crash or become unresponsive.

Technologies: [HdrHistogram](https://junglewise.ai/threats/technologies/hdrhistogram). Vendors: [HdrHistogram](https://junglewise.ai/threats/vendors/hdrhistogram).

## Quick answers

**Is CVE-2026-14683 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-14683 being exploited in the wild.

**How severe is CVE-2026-14683?** Low severity, with a CVSS score of 3.3, published 4 July 2026.

**Which products and versions are affected?** HdrHistogram Up to 2.2.2.

**Is there a fix for CVE-2026-14683?** 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-2026-14683 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-14683?** Check whether you run HdrHistogram 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 vulnerability exists in HdrHistogram up to version 2.2.2 within the 'decodeFromCompressedByteBuffer' function of 'AbstractHistogram.java'. The issue stems from uncontrolled memory allocation (CWE-789/CWE-400) when processing the 'lengthOfCompressedContents' argument. A local attacker can provide a manipulated length value to force the application to allocate an excessive amount of memory, leading to an Out-of-Memory (OOM) condition and denial-of-service. While the project was notified via an issue report, no official patch has been confirmed at the time of this advisory.

## Affected products

- HdrHistogram HdrHistogram Up to 2.2.2

## Timeline

- 2026-07-04: disclosed: Vulnerability published via VulDB/NVD
- 2026-07-04: advisory

## References

- [https://github.com/HdrHistogram/HdrHistogram/](https://github.com/HdrHistogram/HdrHistogram/)
- [https://github.com/HdrHistogram/HdrHistogram/issues/219](https://github.com/HdrHistogram/HdrHistogram/issues/219)
- [https://vuldb.com/cve/CVE-2026-14683](https://vuldb.com/cve/CVE-2026-14683)
- [https://vuldb.com/submit/846750](https://vuldb.com/submit/846750)
- [https://vuldb.com/submit/846752](https://vuldb.com/submit/846752)
- [https://vuldb.com/vuln/376279](https://vuldb.com/vuln/376279)
- [https://vuldb.com/vuln/376279/cti](https://vuldb.com/vuln/376279/cti)

## Related threats

- [HdrHistogram incorrect comparison in DoubleHistogram recordValue](https://junglewise.ai/threats/cve-2026-14686-hdrhistogram-incorrect-comparison-in-doublehistogram-recordvalue)
- [HdrHistogram state manipulation in recordValueWithCount](https://junglewise.ai/threats/cve-2026-14685-hdrhistogram-state-manipulation-in-recordvaluewithcount)
- [HdrHistogram uncontrolled memory allocation in AbstractHistogram](https://junglewise.ai/threats/cve-2026-14684-hdrhistogram-uncontrolled-memory-allocation-in-abstracthistogram)