Tina is a headless content management system. Prior to 0.2.1, the tina-markdown element in packages/@tinacms/web-components/src/tina-markdown.js assigns a rich-text node.url value directly to an anchor href without validating the URL scheme. A content author can store a link using a script-capable scheme, and a visitor who clicks the rendered link executes attacker-controlled script in the site's origin. The script can access same-origin application data and, when the visitor is an editor or administrator, may expose credentials stored by the TinaCMS admin on that origin. This issue is fixed in version 0.2.1.
CVE-2026-108260
HIGHPre-NVD 7.67.6
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.6Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 7.6
- EG Score
- 7.6HIGHlow confidence
- EG Risk
- 39EG Risk 39/100CISA 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 computedSeverity76% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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
October 9, 2026
Last Modified
October 9, 2026
Advisory Details (3)
Auto-updated Oct 9, 2026🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit.
github_commit Patch Available
commit 5295e077f0d2 (tinacms/tinacms)
Patch available: tinacms/tinacms @tinacms/[email protected] (contains commit 5295e077f0d2)
https://github.com/tinacms/tinacms/commit/5295e077f0d279c35686a0e481a15e33a4877e3bgithub_pr Patch Available
Sanitize link and image urls in the tina-markdown element
Patch available: tinacms/tinacms @tinacms/[email protected] (PR #7523 merged 2026-09-08)
https://github.com/tinacms/tinacms/pull/7523githubMentions a patch (unverified)🟡 PoC Available
@tinacms/web-components: `tina-markdown` writes rich-text link URLs into `href` without scheme validation, allowing stored XSS on sites that render CMS content with the web component · Advisory · tinacms/tinacms · GitHub
https://github.com/tinacms/tinacms/security/advisories/GHSA-c42q-qvc3-j6vgVendor Advisories for CVE-2026-108260(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× 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.
- 2026-10-09 21:20 UTCEG score recompute
- 2026-10-09 20:50 UTCEG score recompute
- 2026-10-09 20:50 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-108260?
CVE-2026-108260 is a high vulnerability published on October 9, 2026. Tina is a headless content management system. Prior to 0.2.1, the tina-markdown element in packages/@tinacms/web-components/src/tina-markdown.js assigns a rich-text node.url value directly to an anchor href without validating the URL scheme. A content author can store a link using a script-capable…
When was CVE-2026-108260 disclosed?
CVE-2026-108260 was first published on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-108260?
CVE-2026-108260 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-108260?
A fix for CVE-2026-108260 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-108260 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-108260
Is Your Infrastructure Affected by CVE-2026-108260?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.