Tina is a headless content management system. Prior to 3.0.0, @tinacms/cli reads Git branch values from VERCEL_GIT_COMMIT_REF, GITHUB_BRANCH, or HEAD, incorporates the raw value into the API URL, and interpolates that URL into JavaScript string literals in packages/@tinacms/cli/src/next/codegen/index.ts and packages/@tinacms/cli/src/next/codegen/codegen/plugin.ts. A crafted Git-valid branch name containing a quote can terminate the generated string and inject an expression that executes when the generated client module is imported during a preview build. The injected code runs with the build process privileges and can read environment credentials, modify deployment artifacts, or make network requests. This issue is fixed in version 3.0.0.
CVE-2026-108259
HIGHPre-NVD 8.28.2—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (15th 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
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.2Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 8.2
- EG Score
- 8.2HIGHmedium confidence
- EG Risk
- 42EG Risk 42/100CISA 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 computedSeverity82% × 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
- 0.3%
- EPSS %ILE
- 15th
- 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, 2026Patch available. Sources: github, github_pr, github_commit.
github_commit Patch Available
commit d030d414d39e (tinacms/tinacms)
Patch available: tinacms/tinacms @tinacms/[email protected] (contains commit d030d414d39e)
https://github.com/tinacms/tinacms/commit/d030d414d39e15de79bf36e4c728d57205e71ddegithub_pr Patch Available
Stop a quote in a branch name from injecting code into the generated client
Patch available: tinacms/tinacms @tinacms/[email protected] (PR #7526 merged 2026-09-14)
https://github.com/tinacms/tinacms/pull/7526githubMentions a patch (unverified)
Code injection via unescaped Git branch name in generated client source · Advisory · tinacms/tinacms · GitHub
https://github.com/tinacms/tinacms/security/advisories/GHSA-pwhx-cvv3-qj5cVendor Advisories for CVE-2026-108259(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)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| @tinacms/cli | — |
| — |
Weakness Classification(1)
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 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.
- 2026-10-10 20:01 UTCEG score recompute
- 2026-10-10 19:59 UTCEPSS rescore
- 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 product + same CWE)
Same product
8 shownnpm:@tinacms/cli
Frequently asked(5)
What is CVE-2026-108259?
CVE-2026-108259 is a high vulnerability published on October 9, 2026. Tina is a headless content management system. Prior to 3.0.0, @tinacms/cli reads Git branch values from VERCELGITCOMMITREF, GITHUBBRANCH, or HEAD, incorporates the raw value into the API URL, and interpolates that URL into JavaScript string literals in…
When was CVE-2026-108259 disclosed?
CVE-2026-108259 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.
Is CVE-2026-108259 actively exploited?
CVE-2026-108259 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-108259?
CVE-2026-108259 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-108259?
A fix for CVE-2026-108259 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-108259 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-2026-108259
Is Your Infrastructure Affected by CVE-2026-108259?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.