CVE-2026-35210

highpriority · track · 0OT risk · elevatedEPSS 0.004 · 29 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.35% (29th) EPSS

CVSS 7.1 · high

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260326.0, an authorization bypass vulnerability in OpenCTI allows any authenticated user with KNOWLEDGE_KNUPDATE permission to bypass Confidence Level validation and Object Marking restrictions by injecting the synchronized-upsert: true HTTP header, enabling attackers to downgrade confidence levels, remove security markings such as TLP:RED, manipulate relationships, and affect STIX object types including Indicators, ThreatActors, Malware, and Reports. This issue is fixed in version 7.260326.0.

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.1

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:Nsecondary · ENISA EU

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 4.2

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:Nsecondary · OSV

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-639USCWE-863US

affected products (5)

Products and version ranges known to be affected.

Open Source OpenCTI <7.260326.0all versionscert_bundDE
Open Source OpenCTI< 7.260326.0cert_bundDE
OpenCTI-Platform opencti≤ < 7.260326.0enisa_euvdEU
citeum opencti< 7.260326.0nvdUScpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*
PyPI pycti< 7.260326.0osvUSpkg:pypi/pycti

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2090OpenCTI: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2026-06-25csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in OpenCTI ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
PYSEC-2026-34452026-07-08vendor · osvUS
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260326.0, an authorization bypass vulnerability in OpenCTI allows any authenticated user with KNOWLEDGE_KNUPDATE permission to bypass Confidence Level validation and Object Marking restrictions by injecting the synchronized-upsert: true HTTP header, enabling attackers to downgrade confidence levels, remove security markings such as TLP:RED, manipulate relationships, and affect STIX object types including Indicators, ThreatActors, Malware, and Reports. This issue is fixed in version 7.260326.0.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund nvd NVD CVE.org MITRE

published 2026-07-08modified 2026-10-25

references (12)

External citations — patches, advisories, analysis.

scry

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