CVE-2026-123272
Mark3labs mcp-go before v1.2.1 contains an improper validation vulnerability in OAuthHandler.fetchServerMetadata that allows malicious MCP servers to obtain tokens for other resources by declaring arbitrary resources in well-known metadata. Attackers can declare a different MCP s…
Read full description
Attention and evidence
Evidence confidence: Insufficient evidence
Hype components
Sources and documents
Score evolution
● Hype ● Reality
First record: hype 0.0 · reality 2.8 (2026-11-05 19:31). The curve appears once the score changes.
Public exploit evidence
Public exploit entries / repo candidates
Evidence context and dated references
Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs. Published 1 days ago. Exploitation evidence usually takes weeks to show up: a low reality score can mean there is no data yet, not that the flaw is mild.
Evidence in context
- Confidence in exploitation evidence
- Insufficient evidence
- Priority basis
- Exploitation in attacks unconfirmed; CVSS 8; fresh prediction unavailable
- Attention, last 30 days
- 0 distinct story titles; 0 press documents; 0 publisher domains.
- Technical potential
- network access, no prior privileges, user interaction, additional attack conditions.
- Observed activity
- No exploitation observation is recorded.
- Known scale
- Not quantified.
- Evidence confidence basis
- Insufficient evidence
Score evaluated: 2026-11-05 19:31:22.954284+00:00 · EPSS snapshot: not available