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VulnerabilityPublished Updated

CVE-2026-40994: Spring Web Services · Insecure Default

Affects Spring Web ServicesSource CVE Database V5

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Not known to be exploited · CVSS 8.2 High · fixed in 5.0.1.1 : patch Spring Web Services soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.0.1.1, 4.1.3.1, 4.0.19 +1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Spring Web Services to 5.0.1.1, 4.1.3.1, 4.0.19 or 3.1.9.

Affected software

ProductAffectedFixed in
SpringSpring Web ServicesAffected
  • >=5.0.0 <5.0.1.1
Fixed in
  • 5.0.1.1
SpringSpring Web ServicesAffected
  • >=4.1.0 <4.1.3.1
Fixed in
  • 4.1.3.1
SpringSpring Web ServicesAffected
  • >=4.0.0 <4.0.19
Fixed in
  • 4.0.19
SpringSpring Web ServicesAffected
  • >=3.1.0 <3.1.9
Fixed in
  • 3.1.9

AI-suggested

If you cannot patch yet, consider additional WS-Security validation controls or compensating controls to enforce BSP compliance externally if feasible.

Description

Wss4jSecurityInterceptor initialized its BSP (WS-I Basic Security Profile) compliance flag so that inbound validation disabled WSS4J BSP enforcement on RequestData. Services that validate WS-Security on the network could therefore accept messages that violate BSP rules, weakening protocol-level checks. 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.

References

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