# CVE-2026-71497 — jhy jsoup

> As of 2026-08-07, CVE-2026-71497 is a MEDIUM-severity vulnerability in jhy jsoup, CVSS v3.1 4.7, EPSS 0.1% (8.8th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-71497 as of 2026-08-07; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-07

## What is CVE-2026-71497?

jsoup is a Java library for working with real-world HTML. From 1.14.3 until 1.23.1, jsoup's HTML parser could incorrectly handle a malformed tag name ending in a control character, causing the tag to acquire the parsing behavior of a different element. When a custom Safelist permits certain raw-text elements, this misparsing can cause content that should remain inert text to be emitted as active markup after serialization, potentially resulting in cross-site scripting. jsoup's built-in Safelists are not affected. This issue is fixed in version 1.23.1.

The record classifies CVE-2026-71497 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 60 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.7 — MEDIUM (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 8.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-06, last modified 2026-08-07

## Is CVE-2026-71497 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **jhy**: jsoup

Affected software packages:

- `maven:org.jsoup:jsoup` — patched in 1.23.1

## How to fix CVE-2026-71497

Fixed versions are recorded for 1 package: maven:org.jsoup:jsoup 1.23.1. No vendor patch reference has been recorded for CVE-2026-71497 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-2026-71497

No threat campaign in the Threadlinqs corpus currently references CVE-2026-71497, 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, GitHub Security Advisories, FIRST EPSS, NVD. Last verified by Threadlinqs on 2026-08-09. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/jhy/jsoup/security/advisories/GHSA-pmhh-3w7g-xqp8)

**Other references**

- [github.com](https://github.com/jhy/jsoup/issues/2538)
- [github.com (92f1aca552548b484bc7d4b94c51e48b8e6eca70)](https://github.com/jhy/jsoup/commit/92f1aca552548b484bc7d4b94c51e48b8e6eca70)
- [github.com (jsoup 1.23)](https://github.com/jhy/jsoup/releases/tag/jsoup-1.23.1)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-71497
Full detection coverage and IOCs for threats exploiting CVE-2026-71497 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp