CVE-2026-123802

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (23rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-120153 (ENISA EUVD)Source: ENISA EUVD

8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

SuperTokens Core is an open source authentication server. From 11.3.0 until 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1, a licensed deployment with a configured SAML client can authenticate an identity from an assertion that did not satisfy the audience check. When the identity provider uses assertion-level signing, an attacker who has a still-valid IdP-signed assertion naming the victim for any audience and the attacker's own valid assertion for the target audience can combine them because validateSamlResponseAudience accepts an audience from one assertion while extractAllClaims takes the final NameID and attributes from another; response-level signing does not expose this multi-assertion variant. Independently, an assertion from an identity provider configured for the target deployment but issued to another SuperTokens deployment using the shared default saml_sp_entity_id can satisfy the target's audience check. Successful exploitation authenticates the attacker as the victim IdP user. This issue is fixed in versions 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
23rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.

EG Severity
8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

November 9, 2026

Last Modified

November 12, 2026

Advisory Details (10)

Auto-updated Nov 9, 2026
Patch available. Sources: github, github_commit.
GitHub commit Patch Available

commit b21760ceb508 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v11.4.8 (contains commit b21760ceb508)

https://github.com/supertokens/supertokens-core/commit/b21760ceb5089b0fa30c8fd46f7bbfc680de56dd
GitHub commit Patch Available

commit a2483b692d43 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v11.3.8 (contains commit a2483b692d43)

https://github.com/supertokens/supertokens-core/commit/a2483b692d43294fdb9ad2f8f6f831cca8300081
GitHub commit Patch Available

commit 8e69a85e3870 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v12.0.11 (contains commit 8e69a85e3870)

https://github.com/supertokens/supertokens-core/commit/8e69a85e38709b832869c3bfc83df9a150d6f3cf
GitHub commit Patch Available

commit 5ffdd887b470 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v12.1.2 (contains commit 5ffdd887b470)

https://github.com/supertokens/supertokens-core/commit/5ffdd887b470035f409d61f85f2186381ad9cdd6
GitHub commit Patch Available

commit 53f42f496477 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v12.3.1 (contains commit 53f42f496477)

https://github.com/supertokens/supertokens-core/commit/53f42f496477e7cc3ccd48fe57851fa08d06a248
GitHub commit Patch Available

commit 324686349b21 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v11.4.8 (contains commit 324686349b21)

https://github.com/supertokens/supertokens-core/commit/324686349b21ab46fe465ca5f74294d6c68d3859
GitHub commit Patch Available

commit 1d0fd5b40848 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v12.2.1 (contains commit 1d0fd5b40848)

https://github.com/supertokens/supertokens-core/commit/1d0fd5b40848629295cf86d47be185f92f31e445
GitHub commit Patch Available

commit 1645915320c5 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v11.3.8 (contains commit 1645915320c5)

https://github.com/supertokens/supertokens-core/commit/1645915320c5dfc22bce9029eb7d8364f8df402f
GitHub commit Patch Available

commit 00a15e045323 (supertokens/supertokens-core)

Patch available: supertokens/supertokens-core v12.2.1 (contains commit 00a15e045323)

https://github.com/supertokens/supertokens-core/commit/00a15e045323ba8a566ca6f59b70125b4030ab6c
GitHub advisoryMentions a patch (unverified)

SAML: identity taken from an assertion that never passed the audience check, allowing sign-in as any IdP user · Advisory · supertokens/supertokens-core · GitHub

Affected: 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1 and 12.3.1. The fix:

https://github.com/supertokens/supertokens-core/security/advisories/GHSA-wfg2-vqfg-rqh6

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-12 22:28 UTCEchelonGraph re-scored
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  4. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  5. 2026-11-09 19:27 UTCEchelonGraph re-scored
  6. 2026-11-09 19:00 UTCENISA EUVD ID recordedEUVD-2026-120153 · Source: ENISA EUVD
  7. 2026-11-09 18:30 UTCEchelonGraph re-scoredFirst assessed: 8.1 HIGH
  8. 2026-11-09 18:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-123802?
CVE-2026-123802 is a high-severity vulnerability; its CVE record was published on November 9, 2026. SuperTokens Core is an open source authentication server. From 11.3.0 until 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1, a licensed deployment with a configured SAML client can authenticate an identity from an assertion that did not satisfy the audience check. When the identity provider…
When was the CVE record for CVE-2026-123802 published?
The CVE record for CVE-2026-123802 was published on November 9, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 12, 2026; the record at its source may have been updated since.
Is CVE-2026-123802 actively exploited?
CVE-2026-123802 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-123802?
CVE-2026-123802 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-123802?
A fix for CVE-2026-123802 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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