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CVE-2020-26136

21
FAUCET Score

CVE-2020-26136 describes a vulnerability in SilverStripe versions up to 4.6.0-rc1 where the GraphQL API fails to enforce multi-factor authentication (MFA) when basic authentication is used. This medium-severity flaw (CVSS 6.5) allows an attacker with valid credentials to bypass MFA, potentially leading to unauthorized access and integrity compromise of data (I:H). While no active exploitation, public exploit code, or significant community discussion has been observed, organizations using affected SilverStripe versions should prioritize patching to mitigate this authentication bypass risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.6.0CPE matchmatch criteria
cpe:2.3:a:silverstripe:silverstripe:*:*:*:*:*:*:*:*
4.6.0CPE matchmatch criteria
cpe:2.3:a:silverstripe:silverstripe:4.6.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.16%
Probability of exploitation in next 30 days
EPSS Percentile
63.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0116 is in the 78th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: silverstripe/graphqlFixed in: 3.5.0
composerpatch availablevia ghsa
Product: silverstripe/graphqlFixed in: 4.0.0-alpha2

Vendor Advisories (1)

composerGHSA-mg2g-8pwj-r2j2medium

Authentication bypass in SilverStripe GraphQL

Jun 10, 2021

References

forum.silverstripe.org / c/releases
Release NotesVendor Advisory
silverstripe.org / blog/tag/release
Release NotesVendor Advisory
silverstripe.org / download/security-releases
Vendor Advisory
silverstripe.org / download/security-releases/cve-2020-26136
ExploitVendor Advisory