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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-34986— Go JOSE affect by a panic in JWE decryption

Quick assessment

Affected
go-jose go-jose
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.

Go JOSE是Go JOSE开源的一个 Go 中 JOSE 标准的实现。 Go JOSE 4.1.4之前版本和3.0.5之前版本存在安全漏洞，该漏洞源于解密JSON Web Encryption对象时，如果alg字段指示密钥包装算法且encrypted_key字段为空，可能导致程序崩溃和拒绝服务。

CVSS 7.5 · High EPSS 0.65% · P50

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
go-jose go-jose >= 4.0.0, < 4.1.4 affected
< 3.0.5 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-34986

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Go JOSE affect by a panic in JWE decryption
Source: CVE Program / CVE List V5
Vulnerability Description
Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.4 and 3.0.5, decrypting a JSON Web Encryption (JWE) object will panic if the alg field indicates a key wrapping algorithm (one ending in KW, with the exception of A128GCMKW, A192GCMKW, and A256GCMKW) and the encrypted_key field is empty. The panic happens when cipher.KeyUnwrap() in key_wrap.go attempts to allocate a slice with a zero or negative length based on the length of the encrypted_key. This code path is reachable from ParseEncrypted() / ParseEncryptedJSON() / ParseEncryptedCompact() followed by Decrypt() on the resulting object. Note that the parse functions take a list of accepted key algorithms. If the accepted key algorithms do not include any key wrapping algorithms, parsing will fail and the application will be unaffected. This panic is also reachable by calling cipher.KeyUnwrap() directly with any ciphertext parameter less than 16 bytes long, but calling this function directly is less common. Panics can lead to denial of service. This vulnerability is fixed in 4.1.4 and 3.0.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Go JOSE 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Go JOSE是Go JOSE开源的一个 Go 中 JOSE 标准的实现。 Go JOSE 4.1.4之前版本和3.0.5之前版本存在安全漏洞，该漏洞源于解密JSON Web Encryption对象时，如果alg字段指示密钥包装算法且encrypted_key字段为空，可能导致程序崩溃和拒绝服务。
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
go-jose go-jose >= 4.0.0, < 4.1.4 -

II. Public POCs for CVE-2026-34986

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-34986

请登录查看更多情报信息。

IV. Related Vulnerabilities

Same product: go-jose
Same vendor: go-jose
Same weakness: CWE-248

V. Comments for CVE-2026-34986

No comments yet

Leave a comment