Unknown severity · Source severity not reportedCVE-2026-87939

Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137CVE-2026-87939

Answer in brief

CVE-2026-87939 records a Unknown severity vulnerability in Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137. The current sources do not mark it as known exploited. The current feed maps Drupal/Feed Block (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 22, 2026Updated Oct 22, 2026Source checked Oct 22, 2026First seen by HOL Oct 22, 2026Material review Oct 22, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Drupal/Feed Block (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Drupal/Feed Blockgeneric	>=0.0.0 <2.0.2 \|\| >=3.0.0 <3.0.2	2.0.2, 3.0.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Drupal/Feed Block.
Review the reported fix. Update Drupal/Feed Block to 2.0.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 22, 2026

Sources and claim methodology

Source referencedrupal.org

Upstream source description

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.

Quoted source text, attributed separately from HOL analysis.