4.8

CVE-2026-40986: broadcom spring_web_flow Cross-site Scripting

CVSS: 4.8v3.1MediumAnalyzed
AliasesGHSA-hw5c-xm3c-v96w
Published 11-06-2026Last modified 23-06-2026
Open JSON

Vulnerability summary

CVE-2026-40986 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in broadcom spring_web_flow. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.8% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.25%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-06-2026
    PublishedVulnerability first disclosed.
  2. 23-06-2026
    Last modifiedVulnerability information updated.

Description

Spring Web Flow's JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not "text/html", which can result in a scripting attack in the user's browser if the error response from the server contains error details with input reflected from an attacker. Affected versions: Spring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

+0.05 pp

From 0.21% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Broadcom1 product
Org.springframework.webflow1 product
  • spring-webflow≥ 4.0.0, < 4.0.1 | ≥ 3.0.0, < 3.0.2 | ≤ 2.5.1
Spring1 product
  • spring web flow≥ 4.0.0, < 4.0.0.1 | ≥ 3.0.0, < 3.0.1.1 | ≥ 2.5.0, < 2.5.2

3 vendors · 3 products

References

3 links