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CVE-2026-39829— Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

AI Predicted 7.5 Difficulty: Trivial EPSS 0.28% · P19

Affected Version Matrix 1

VendorProductVersion RangeStatus
golang.org/x/cryptogolang.org/x/crypto/ssh< 0.52.0affected
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I. Basic Information for CVE-2026-39829

Vulnerability Information
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Vulnerability Title
Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh
Source: NVD (National Vulnerability Database)
Vulnerability Description
The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于RSA和DSA公钥解析器未对密钥参数实施大小限制，可能导致签名验证期间CPU消耗数分钟。
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

VendorProductAffected VersionsCPESubscribe
golang.org/x/cryptogolang.org/x/crypto/ssh 0 ~ 0.52.0 -

II. Public POCs for CVE-2026-39829

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III. Intelligence Information for CVE-2026-39829

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Patches & Fixes for CVE-2026-39829 (2)

Vendor Advisories for CVE-2026-39829 (3)

Same Patch Batch · golang.org/x/crypto · 2026-05-22 · 13 CVEs total

CVE-2026-42508Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts
CVE-2026-39835Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh
CVE-2026-39831Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh
CVE-2026-39833Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent
CVE-2026-39834Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh
CVE-2026-39830Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/
CVE-2026-39828Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh
CVE-2026-39827Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh
CVE-2026-39832Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent
CVE-2026-46597Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh
CVE-2026-46598Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent
CVE-2026-46595Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ss

IV. Related Vulnerabilities

Same product: golang.org/x/crypto/ssh
Same vendor: golang.org/x/crypto

V. Comments for CVE-2026-39829

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