# CVE-2026-14683 — HdrHistogram

> As of 2026-07-04, CVE-2026-14683 is a LOW-severity vulnerability in HdrHistogram, CVSS v3.1 3.3, EPSS 0.1% (1.9th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-14683 as of 2026-07-04; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-04

## What is CVE-2026-14683?

A vulnerability was detected in HdrHistogram up to 2.2.2. Affected by this issue is the function org.HdrHistogram.AbstractHistogram.decodeFromCompressedByteBuffer of the file src/main/java/org/HdrHistogram/AbstractHistogram.java. The manipulation of the argument lengthOfCompressedContents results in uncontrolled memory allocation. The attack needs to be approached locally. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

The record classifies CVE-2026-14683 under weakness classes [CWE-789](https://cwe.mitre.org/data/definitions/789.html), [CWE-400](https://intel.threadlinqs.com/cwe/CWE-400). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 93 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 3.3 — LOW (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R`)
- **CVSS v4.0 base score:** 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 1.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 1.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-04

## Is CVE-2026-14683 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **(vendor unspecified)**: HdrHistogram

## How to fix CVE-2026-14683

No vendor patch reference has been recorded for CVE-2026-14683 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-14683

No threat campaign in the Threadlinqs corpus currently references CVE-2026-14683, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-07-06.

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/HdrHistogram/HdrHistogram/issues/219)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/376279)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/376279/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-14683)
- [vuldb.com — third party advisory (846750)](https://vuldb.com/submit/846750)
- [vuldb.com — third party advisory (846752)](https://vuldb.com/submit/846752)

**Issue tracking and product pages**

- [github.com — product](https://github.com/HdrHistogram/HdrHistogram/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-14683
Full detection coverage and IOCs for threats exploiting CVE-2026-14683 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp