4.2

CVE-2026-41839: spring spring framework Session Fixation

CVSS: 4.2v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-41839DEBIAN-CVE-2026-41839CGA-6xj5-r8gq-xgqg
Published 09-06-2026Last modified 23-06-2026
Open JSON

Vulnerability summary

CVE-2026-41839 is a medium (CVSS 4.2) Session Fixation vulnerability in spring spring framework. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.2/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-M783-2FMW-93GH

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 23-06-2026
    Last modifiedVulnerability information updated.

Description

A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.21%

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

Chainguard4 products
  • kafbat-ui< 1.5.0-r12
  • kafbat-ui-fips< 1.5.0-r6
  • kayenta-2025.2All versions (No fix recorded)
  • kayenta-fips-2025.2All versions (No fix recorded)
Debian1 product
  • libspring-javaAll versions (No fix recorded)
Org.springframework1 product
  • spring-webflux≥ 7.0.0, < 7.0.8 | ≥ 6.2.0, < 6.2.19 | ≥ 6.1.0, ≤ 6.1.21 | ≤ 5.3.39
Spring1 product
  • spring framework≥ 7.0.0, < 7.0.7.1 | ≥ 6.2.0, < 6.2.18.1 | ≥ 6.1.0, < 6.1.28 | ≥ 5.3.0, < 5.3.49
Ubuntu1 product
  • libspring-javaAll versions (No fix recorded)
Vmware1 product
  • spring_framework< 5.3.49 | ≥ 6.1.0, < 6.1.28 | ≥ 6.2.0, < 6.2.19 | ≥ 7.0.0, < 7.0.8

6 vendors · 9 products

References

12 links
Show all 12 references