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CVE Record

CVE-2020-26136: In SilverStripe through 4.6.0-rc1, GraphQL doesn't honour MFA (multi-factor authentication) when using basi...

In SilverStripe through 4.6.0-rc1, GraphQL doesn't honour MFA (multi-factor authentication) when using basic authentication.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

SilverStripe sites using GraphQL and basic authentication may have allowed a password-only path to bypass configured MFA. The business concern is weakened account protection where teams relied on MFA for administrative or API access. The supplied sources do not provide CVSS, active exploitation evidence, or detailed deployment conditions.

Executive priority

Treat this as a targeted authentication assurance issue. Prioritize environments where SilverStripe GraphQL is internet-accessible or tied to privileged accounts, and require vendor-guided remediation before relying on MFA coverage.

Technical view

CVE-2020-26136 states that SilverStripe through 4.6.0-rc1 does not honor MFA for GraphQL requests using Basic Authentication. This is an authentication control bypass in a specific access path. The source bundle does not list CWEs, affected CPEs, exploit details, or a confirmed fixed version.

Likely exposure

Exposure is most likely on SilverStripe deployments at or before 4.6.0-rc1 that have GraphQL enabled, MFA configured, and Basic Authentication accepted for relevant users or endpoints.

Exploitation context

CISA KEV is false in the bundle, and no cited source states active exploitation. The risk depends on whether attackers can reach GraphQL and possess or obtain valid username and password credentials.

Researcher notes

The public bundle is sparse. It identifies the vulnerable condition but does not provide CVSS, CWE, affected package metadata, exploit status, or fixed-version specifics. Validation should focus on version, GraphQL exposure, Basic Authentication acceptance, and MFA behavior.

Mitigation direction

  • Review the linked SilverStripe advisory and release guidance.
  • Upgrade SilverStripe according to vendor security release instructions.
  • Disable Basic Authentication for GraphQL where business requirements allow.
  • Restrict GraphQL access to trusted networks or authenticated application paths.
  • Review MFA enforcement for all administrative and API authentication flows.

Validation and detection

  • Inventory SilverStripe versions and identify deployments at or before 4.6.0-rc1.
  • Confirm whether GraphQL is enabled and reachable externally.
  • Check whether Basic Authentication is accepted for GraphQL requests.
  • Verify MFA is enforced on all supported authentication paths.
  • Review logs for GraphQL access using Basic Authentication.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2020-26136 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.