CVE-2026-71497

jsoup: Cleaner may expose markup with custom raw-text elements

CVSS score

4.7

EPSS probability

%0.3

Risk score

0.0

Published

2 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-71497 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-71497 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	jhy	jsoup	View
2	maven	org.jsoup:jsoup	View
3	maven	org.jsoup:jsoup	View

Total affected vendors: 2|Products: 3

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
4.7	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N	CVE CNA
4.7	CVSS 3.x	—	Vector not published	GitHub Advisory
4.7	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N	NVD
0.0	CVSS 4.0	—	Vector not published	GitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

osvorg.jsoup:jsoup1.23.1

OSV düzeltilmiş sürüm: 1.23.1

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-71497 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-71497 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekiyor

Official Sources and Advisories

https://github.com/jhy/jsoup/security/advisories/GHSA-pmhh-3w7g-xqp8vendor-advisory https://github.com/jhy/jsoup/issues/2538vendor-advisory https://github.com/jhy/jsoup/commit/92f1aca552548b484bc7d4b94c51e48b8e6eca70vendor-advisory https://github.com/jhy/jsoup/releases/tag/jsoup-1.23.1vendor-advisory https://github.com/advisories/GHSA-pmhh-3w7g-xqp8vendor-advisory https://github.com/jhy/jsoupvendor-advisory

CVSS Vector Radar Chart

4.7 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone required

User Interaction—

Confidentiality (Gizlilik)High

Integrity (Bütünlük)Low

Availability (Erişilebilirlik)None

Yama doğrulandı

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

jhy

maven

Weakness Type (CWE & CAPEC)

CWE-79

Similar Vulnerabilities

9.0

CVE-2021-45046 Actively exploited

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