Go net/mail 1.25.x-1.26.3: ParseAddress/Date CPU/Memory Exhaustion
CVE-2026-39820 Published on May 7, 2026

Quadratic string concatentation in consumeComment in net/mail
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

NVD

Vulnerability Analysis

CVE-2026-39820 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Products Associated with CVE-2026-39820

Want to know whenever a new CVE is published for GoLang Go? stack.watch will email you.

GoLang Go
 

Affected Versions

Go standard library net/mail: