CVE-2026-41838

Q: How do I fix CVE-2026-41838?

Upgrade spring framework to 6.1.28 or later.

Q: Is CVE-2026-41838 being actively exploited?

Not that we know of. CVE-2026-41838 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.17% is the estimated probability that it will be exploited in the next 30 days. That is higher than 7% of all scored CVEs.

Q: How severe is CVE-2026-41838?

CVE-2026-41838 has a CVSS v3 base score of 4.8, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-41838 affect?

Published advisories record a fix for spring framework (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

4.8

CVSS v3

NVD

Description

IDs for WebSocket sessions in the spring-websocket module are not cryptographically unpredictable, which may be possible to exploit in combination with inadequate authorization rules. 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.

CWE-330

How to fix

Remediation Available

spring frameworkNVD

Affected:>= 6.1.0, < 6.1.28Fixed in:6.1.28CVE-2026-41838derived from NVD

Affected:>= 6.2.0, < 6.2.18.1Fixed in:6.2.18.1CVE-2026-41838derived from NVD

Affected:>= 5.3.0, < 5.3.49Fixed in:5.3.49CVE-2026-41838derived from NVD

Affected:>= 7.0.0, < 7.0.7.1Fixed in:7.0.7.1CVE-2026-41838derived from NVD

Affected:>= 7.0.0, < 7.0.8Fixed in:7.0.8CVE-2026-41838derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Vendor Advisory1

spring.io

Related Vulnerabilities

Other CWE-330 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-5420	Critical	9.8	92%	-	Fix
CVE-2021-34646	Critical	9.8	51%	-	-
CVE-2008-0087	High	7.5	32%	-	-
CVE-2017-6026	Critical	9.1	32%	-	-
CVE-2018-17888	Critical	9.8	30%	-	-
CVE-2020-11901	Critical	9.0	21%	-	Fix

Common questions

How do I fix CVE-2026-41838?

Upgrade spring framework to 6.1.28 or later.

Is CVE-2026-41838 being actively exploited?

Not that we know of. CVE-2026-41838 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.17% is the estimated probability that it will be exploited in the next 30 days. That is higher than 7% of all scored CVEs.

How severe is CVE-2026-41838?

CVE-2026-41838 has a CVSS v3 base score of 4.8, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-41838 affect?

Published advisories record a fix for spring framework (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-23.