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: 0.3% (16th percentile of EPSS-scored CVEs). 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: 0.3%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 rangeFix by version rangeDependents
@tinacms/cli—
  • every version up to 2.5.2: fixed in 2.5.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 42× 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. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 19:24 UTCEG score recompute
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-02 17:56 UTCEPSS rescore
  5. 2026-10-02 15:53 UTCEG score recompute
  6. 2026-10-01 19:50 UTCEPSS rescore
  7. 2026-10-01 13:54 UTCEG score recompute
  8. 2026-09-30 15:03 UTCEPSS rescore
  9. 2026-09-30 11:56 UTCEG score recompute
  10. 2026-09-29 08:17 UTCEG score recompute
  11. 2026-09-28 06:13 UTCEG score recompute
  12. 2026-09-27 04:15 UTCEG score recompute
  13. 2026-09-26 15:59 UTCEPSS rescore
  14. 2026-09-25 02:10 UTCEG score recompute
  15. 2026-09-24 00:11 UTCEG score recompute
  16. 2026-09-23 17:54 UTCEPSS rescore
  17. 2026-09-22 22:13 UTCEG score recompute
  18. 2026-09-21 20:13 UTCEG score recompute
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 18:14 UTCEG score recompute
  21. 2026-09-19 15:43 UTCEG score recompute
  22. 2026-09-18 19:28 UTCEPSS rescore
  23. 2026-09-18 13:42 UTCEG score recompute
  24. 2026-09-17 11:44 UTCEG score recompute
  25. 2026-09-16 14:08 UTCEPSS rescore
Show 45 more
  1. 2026-09-16 09:46 UTCEG score recompute
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-15 05:47 UTCEG score recompute
  4. 2026-09-14 03:28 UTCEG score recompute
  5. 2026-09-13 01:30 UTCEG score recompute
  6. 2026-09-11 23:31 UTCEG score recompute
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 09:37 UTCEPSS rescore
  9. 2026-09-10 21:23 UTCEG score recompute
  10. 2026-09-09 02:09 UTCEG score recompute
  11. 2026-09-08 22:01 UTCEPSS rescore
  12. 2026-09-07 20:05 UTCEG score recompute
  13. 2026-09-07 16:01 UTCEPSS rescore
  14. 2026-09-06 18:07 UTCEG score recompute
  15. 2026-09-06 13:47 UTCEPSS rescore
  16. 2026-09-05 16:06 UTCEG score recompute
  17. 2026-09-05 15:31 UTCEPSS rescore
  18. 2026-09-04 14:07 UTCEG score recompute
  19. 2026-09-04 05:07 UTCEPSS rescore
  20. 2026-09-03 12:09 UTCEG score recompute
  21. 2026-09-02 14:12 UTCEPSS rescore
  22. 2026-09-02 09:37 UTCEG score recompute
  23. 2026-09-01 13:54 UTCEPSS rescore
  24. 2026-08-31 05:35 UTCEG score recompute
  25. 2026-08-30 19:17 UTCEPSS rescore
  26. 2026-08-30 03:36 UTCEG score recompute
  27. 2026-08-30 01:22 UTCEPSS rescore
  28. 2026-08-29 01:37 UTCEG score recompute
  29. 2026-08-28 21:42 UTCEPSS rescore
  30. 2026-08-27 19:53 UTCEG score recompute
  31. 2026-08-27 14:25 UTCEPSS rescore
  32. 2026-08-26 17:54 UTCEG score recompute
  33. 2026-08-26 14:46 UTCEPSS rescore
  34. 2026-08-25 15:23 UTCEG score recompute
  35. 2026-08-25 14:35 UTCEG score recompute
  36. 2026-08-25 08:18 UTCEG score recompute
  37. 2026-08-23 04:17 UTCEG score recompute
  38. 2026-08-23 00:19 UTCEPSS rescore
  39. 2026-08-22 02:18 UTCEG score recompute
  40. 2026-08-21 23:49 UTCEPSS rescore
  41. 2026-08-21 00:16 UTCEG score recompute
  42. 2026-08-20 22:55 UTCEPSS rescore
  43. 2026-08-19 22:18 UTCEG score recompute
  44. 2026-08-19 21:48 UTCEG score recompute
  45. 2026-08-19 21:47 UTCMITRE cvelistV5first tracked

Related CVEs(same product + 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 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 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63123?
CVE-2026-63123 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-63123?
A fix for CVE-2026-63123 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63123 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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

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