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VulnerabilityPublished

CVE-2026-123798: supertokens-core · Improper Authentication

Affects supertokens-coreSource CVE Database V5

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Not known to be exploited · CVSS 8.1 High · fixed in 12.0.10 : patch supertokens-core soon.

Data as of 9 Nov 2026, 18:34 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.18.1
Patch
Available – fixed in 12.0.10, 11.4.7, 11.3.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 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 9 Nov 2026.

What to do

Upgrade supertokens-core to 12.0.10, 11.4.7 or 11.3.7.

Affected software

ProductAffectedFixed in
supertokenssupertokens-coreAffected
  • >=12.0.6 <12.0.10
Fixed in
  • 12.0.10
supertokenssupertokens-coreAffected
  • >=11.4.0 <11.4.7
Fixed in
  • 11.4.7
supertokenssupertokens-coreAffected
  • >=11.3.0 <11.3.7
Fixed in
  • 11.3.7

AI-suggested

Upgrade SuperTokens Core to version 11.3.7, 11.4.7, or 12.0.10 or later, where the vulnerability is fixed. No other mitigation is required as the fix addresses the root cause of improper signature validation.

Description

SuperTokens Core versions 11.3.0 through 11.3.6, 11.4.0 through 11.4.6, and 12.0.6 through 12.0.9 contain an improper authentication vulnerability due to incorrect SAML signature validation. The software accepts cryptographically valid signatures that reference different XML elements than those used for authentication, enabling XML Signature Wrapping attacks. This allows an attacker to impersonate another identity provider user. The issue affects both response-level and assertion-level signing and is fixed in versions 11.3.7, 11.4.7, and 12.0.10.

References

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