CVE-2026-40999: When WS-Addressing is used with non-anonymous ReplyTo or FaultTo addresses, Spring WS may initiate outbound co

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HIGH 8.6REMOTEUPGRADE

CVE-2026-40999 is a high-severity flaw (CVSS 8.6) affecting spring web services. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When WS-Addressing is used with non-anonymous ReplyTo or FaultTo addresses, Spring WS may initiate outbound connections through configured WebServiceMessageSender instances to destinations taken directly from request headers without verifying that those destinations are safe to connect to. Affected versions: Spring Web Services 5.0.0 through 5.0.1; 4.1.0 through 4.1.3; 4.0.0 through 4.0.18; 3.1.0 through 3.1.8.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-06-11
Last modified	2026-09-04

Publisher (CNA): VMware · Vendor: broadcom

Last updated 2026-09-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-11 07:16 UTCPublished CVE record published
2026-09-04 18:18 UTCUpdated Record last modified

broadcom spring web services UPGRADE

Affected: < 3.1.9 · >= 4.0.0 and < 4.0.19 · >= 4.1.0 and < 4.1.3.1 · >= 5.0.0 and < 5.0.1.1

Fixed in: 3.1.9, 4.0.19, 4.1.3.1, 5.0.1.1

Safe to downgrade to: a release before 4.0.0

1. Check installed version

apt-cache policy spring-web-services || rpm -q spring-web-services || spring-web-services --version

2. UPGRADE to 3.1.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-web-services

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-web-services

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison spring-web-services sudo apt install spring-web-services=<VERSION_BEFORE_4.0.0> sudo apt-mark hold spring-web-services

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spring-web-services sudo dnf downgrade spring-web-services-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add spring-web-services

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40999?

spring web services: upgrade to 3.1.9, 4.0.19, 4.1.3.1, 5.0.1.1. Exact commands for each OS are on this page.

Is CVE-2026-40999 being exploited?

CVE-2026-40999 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40999 affect?

CVE-2026-40999 affects spring web services. Severity is high (CVSS 8.6). When WS-Addressing is used with non-anonymous ReplyTo or FaultTo addresses, Spring WS may initiate outbound connections through configured WebServiceMessageSender instances to destinations taken directly from request headers without verifyi

How urgent is CVE-2026-40999?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

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References

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