Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-48758— sigstore-js: DSSE payloadType type-binding failure

Quick assessment

Affected
sigstore sigstore-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

sigstore sigstore-js是美国sigstore组织的一个JavaScript签名服务库。 sigstore-js 3.2.1之前版本存在加密问题漏洞，该漏洞源于preAuthEncoding函数使用Node.js ascii编码将PAE字符串转换为字节，可能允许签名后修改payloadType，从而破坏DSSE的类型绑定保证。

CVSS 5.4 · Medium EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
sigstore sigstore-js < 3.2.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-48758

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
sigstore-js: DSSE payloadType type-binding failure
Source: CVE Program / CVE List V5
Vulnerability Description
sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature and breaking the type-binding guarantee that DSSE is designed to provide. This issue is fixed in version 3.2.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
sigstore-js 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sigstore sigstore-js是美国sigstore组织的一个JavaScript签名服务库。 sigstore-js 3.2.1之前版本存在加密问题漏洞，该漏洞源于preAuthEncoding函数使用Node.js ascii编码将PAE字符串转换为字节，可能允许签名后修改payloadType，从而破坏DSSE的类型绑定保证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sigstore sigstore-js < 3.2.1 -

II. Public POCs for CVE-2026-48758

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-48758

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-48758 (3)

Vendor Advisories for CVE-2026-48758 (1)

Same Patch Batch · sigstore · 2026-07-14 · 4 CVEs total

CVE-2026-59891 9.6 CRITICAL Credential confusion in  @sigstore/oci  can leak registry credentials to an attacker-contr
CVE-2026-48815 7.5 HIGH sigstore-js: `certificateOIDs` verification constraints are silently dropped and never enf
CVE-2026-48816 6.5 MEDIUM sigstore-js: Insufficient Verification of Data Authenticity

IV. Related Vulnerabilities

Same product: sigstore-js
Same vendor: sigstore
Same weakness: CWE-347

V. Comments for CVE-2026-48758

No comments yet

Leave a comment