Vulnerability-Lookup

FKIE_CVE-2026-40988

Vulnerability from fkie_nvd - Published: 2026-06-10 00:16 - Updated: 2026-07-23 09:10

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

An application using spring-security-saml2-service-provider and the REDIRECT binding for SAML 2.0 Login or Logout may be vulnerable to a denial of service by way of an unbounded writer that inflates the compressed SAML payload into memory. Affected versions: Spring Security 5.7.0 through 5.7.23; 5.8.0 through 5.8.25; 6.3.0 through 6.3.16; 6.4.0 through 6.4.16; 6.5.0 through 6.5.10; 7.0.0 through 7.0.5.

References

	URL	Tags
	security@vmware.com	https://spring.io/security/cve-2026-40988	Vendor Advisory

Impacted products

Vendor	Product	Version
vmware	spring_security	*
vmware	spring_security	*
vmware	spring_security	*
vmware	spring_security	*
vmware	spring_security	*
vmware	spring_security	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Spring Security",
          "vendor": "Spring",
          "versions": [
            {
              "lessThan": "5.7.24",
              "status": "affected",
              "version": "5.7.0",
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              "status": "affected",
              "version": "5.8.0",
              "versionType": "custom"
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              "version": "6.4.0",
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              "status": "affected",
              "version": "6.5.0",
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              "version": "7.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@vmware.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AB5C2BB6-3DED-4AFA-B2F7-5D0D68F04E1F",
              "versionEndExcluding": "5.7.24",
              "versionStartIncluding": "5.7.0",
              "vulnerable": true
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            {
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              "matchCriteriaId": "55C5A1C3-2071-41EE-A218-B36A531072AC",
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              "versionStartIncluding": "5.8.0",
              "vulnerable": true
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              "vulnerable": true
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    },
    {
      "lang": "es",
      "value": "Una aplicaci\u00f3n que utiliza spring-security-saml2-service-provider y el binding REDIRECT para el inicio o cierre de sesi\u00f3n de SAML 2.0 puede ser vulnerable a una denegaci\u00f3n de servicio por medio de un escritor sin l\u00edmites que infla la carga \u00fatil SAML comprimida en la memoria.\n\nVersiones afectadas:\nSpring Security 5.7.0 hasta 5.7.23; 5.8.0 hasta 5.8.25; 6.3.0 hasta 6.3.16; 6.4.0 hasta 6.4.16; 6.5.0 hasta 6.5.10; 7.0.0 hasta 7.0.5."
    }
  ],
  "id": "CVE-2026-40988",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
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          "attackComplexity": "LOW",
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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        "impactScore": 3.6,
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        "type": "Secondary"
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  "vulnStatus": "Analyzed",
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}

CVE-2026-40988 (GCVE-0-2026-40988)

Vulnerability from cvelistv5 – Published: 2026-06-09 23:46 – Updated: 2026-06-27 21:22

Title

Unbounded DEFLATE Inflation in SAML 2.0 Service Provider

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-10 18:08 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

vmware mitre root

References

1 reference

URL	Tags
https://spring.io/security/cve-2026-40988

Impacted products

1 product

Vendor	Product	Version
Spring	Spring Security	Affected: 5.7.0 , < 5.7.24 (custom) Affected: 5.8.0 , < 5.8.26 (custom) Affected: 6.3.0 , < 6.3.17 (custom) Affected: 6.4.0 , < 6.4.17 (custom) Affected: 6.5.0 , < 6.5.10.2 (custom) Affected: 7.0.0 , < 7.0.5.1 (custom)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.