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[GHSA-8ffj-4hx4-9pgf] [CVE-2026-39413] - Request for CVSS correction or clarification

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
42/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
冷清
领域
security

调研方向

从 CVE-2026-39413 advisory 开始,将其当前的 CVSS vector 与 issue 中的攻击细节以及链接的 CVSS 参考资料进行比较。验证关于未经身份验证伪造 JWT 以及对管理员影响的说法;当 advisory 的 vector 和理由得到修正,或现有评估被记录为准确时,即表示完成。

由索引模型根据 Issue 内容生成。

描述

Hi GitHub,

Our automated CVSS enrichment pipeline detected some discrepancies between GitHub's provided vector and ours. Since this also passed a GitHub review, I thought it would be helpful to share my insights here, so that the vector or its justification might be corrected. For reference, this was the output from our AI pipeline: https://graph.volerion.com/view?id=CVE-2026-39413.

The current vector states AC:H, PR:H, UI:R, but an actual attack seems to involve only an unauthenticated attacker forging a valid JWT via a 'none' algorithm, therefore encountering none of those exploitation barriers.

Additionally, I would make the point that C:H/I:N/A:N is best changed to C:H/I:H/A:N to better reflect the potential administrator access an attacker might obtain after successful exploitation.

This comes down to a final vector of:
https://volerion.com/cvss/3.1#vector=CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
A pretty steep upgrade from a base score of 4.2 to 9.1.

I have hundreds more in the pipeline for 2026 alone, but unfortunately, I don't have the bandwidth to go through them all of them in this manner. Feel free to email me at karel@volerion.com and perhaps we can work out a more streamlined method of setting the records straight.

Thanks!

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