Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe (CVE-2026-103278) | HOL Guard CVE

High · CVSS 8.5CVE-2026-103278

Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe

Answer in brief

CVE-2026-103278 records a High severity (CVSS 8.5) vulnerability in Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe. The current sources do not mark it as known exploited. The current feed maps TryGhost/Ghost (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TryGhost/Ghost (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
TryGhost/Ghostgeneric	>=5.8.0 <6.34.0	6.34.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for TryGhost/Ghost.
Review the reported fix. Update TryGhost/Ghost to 6.34.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 1, 2026

Sources and claim methodology

Upstream source description

Ghost versions 5.8.0 before 6.34.0 contain an input validation vulnerability in the admin iframe that allows attackers to take over staff user accounts. Attackers with content publishing privileges can craft malicious pages that, when visited by active staff users, enable account takeover through improper input validation.

Quoted source text, attributed separately from HOL analysis.