CVE-2026-63123

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 87% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Tina is a headless content management system. Prior to 2.5.2, the TinaCMS CLI package's Vite dev server packages/@tinacms/cli/src/next/vite/cors.ts origin callback returns false for a disallowed origin but does not reject the request, and packages/@tinacms/cli/src/next/vite/plugins.ts still routes POST /media/upload/* to mediaRouter.handlePost. The upload code in packages/@tinacms/cli/src/next/commands/dev-command/server/media.ts writes attacker-controlled multipart contents inside the configured media root. A remote attacker can cause a developer's browser to submit this state-changing request by inducing the developer to visit an attacker-controlled page while tinacms dev is running. This issue is fixed in version 2.5.2.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit.
github_commit Patch Available

commit 211997cdb53c (tinacms/tinacms)

Patch available: tinacms/tinacms [email protected] (contains commit 211997cdb53c)

https://github.com/tinacms/tinacms/commit/211997cdb53cbd43638bdee999faa65375cfc260
github_pr Patch Available

Reject cross-origin state-changing requests on the dev server

Patch available: tinacms/tinacms [email protected] (PR #7111 merged 2026-06-29)

https://github.com/tinacms/tinacms/pull/7111
github Patch Available🟡 PoC Available

Cross-origin `POST /media/upload/*` requests can write arbitrary files into the Tina dev server media root · Advisory · tinacms/tinacms · GitHub

https://github.com/tinacms/tinacms/security/advisories/GHSA-rgr9-r7mj-mf6x

Vendor Advisories for CVE-2026-63123(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@tinacms/cli—2.5.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 13:42 UTCEG score recompute
  3. 2026-09-17 11:44 UTCEG score recompute
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 09:46 UTCEG score recompute
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 05:47 UTCEG score recompute
  8. 2026-09-14 03:28 UTCEG score recompute
  9. 2026-09-13 01:30 UTCEG score recompute
  10. 2026-09-11 23:31 UTCEG score recompute
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 09:37 UTCEPSS rescore
  13. 2026-09-10 21:23 UTCEG score recompute
  14. 2026-09-09 02:09 UTCEG score recompute
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-07 20:05 UTCEG score recompute
  17. 2026-09-07 16:01 UTCEPSS rescore
  18. 2026-09-06 18:07 UTCEG score recompute
  19. 2026-09-06 13:47 UTCEPSS rescore
  20. 2026-09-05 16:06 UTCEG score recompute
  21. 2026-09-05 15:31 UTCEPSS rescore
  22. 2026-09-04 14:07 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-03 12:09 UTCEG score recompute
  25. 2026-09-02 14:12 UTCEPSS rescore
Show 24 more
  1. 2026-09-02 09:37 UTCEG score recompute
  2. 2026-09-01 13:54 UTCEPSS rescore
  3. 2026-08-31 05:35 UTCEG score recompute
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 03:36 UTCEG score recompute
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-29 01:37 UTCEG score recompute
  8. 2026-08-28 21:42 UTCEPSS rescore
  9. 2026-08-27 19:53 UTCEG score recompute
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-26 17:54 UTCEG score recompute
  12. 2026-08-26 14:46 UTCEPSS rescore
  13. 2026-08-25 15:23 UTCEG score recompute
  14. 2026-08-25 14:35 UTCEG score recompute
  15. 2026-08-25 08:18 UTCEG score recompute
  16. 2026-08-23 04:17 UTCEG score recompute
  17. 2026-08-23 00:19 UTCEPSS rescore
  18. 2026-08-22 02:18 UTCEG score recompute
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 00:16 UTCEG score recompute
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-19 22:18 UTCEG score recompute
  23. 2026-08-19 21:48 UTCEG score recompute
  24. 2026-08-19 21:47 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63123?
CVE-2026-63123 is a medium vulnerability published on August 19, 2026. Tina is a headless content management system. Prior to 2.5.2, the TinaCMS CLI package's Vite dev server packages/@tinacms/cli/src/next/vite/cors.ts origin callback returns false for a disallowed origin but does not reject the request, and packages/@tinacms/cli/src/next/vite/plugins.ts still routes…
When was CVE-2026-63123 disclosed?
CVE-2026-63123 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63123 actively exploited?
CVE-2026-63123 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.9% of all scored CVEs.
What is the CVSS score of CVE-2026-63123?
CVE-2026-63123 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-63123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63123, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-63123

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