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RUSTSEC-2026-0009

Denial of Service via Stack Exhaustion
Reported
Issued
Package
time (crates.io)
Type
Vulnerability
Categories
Keywords
#stack #exhaustion
Aliases
References
CVSS Score
6.8 MEDIUM
CVSS Details
Attack Complexity
High
Attack Requirements
None
Attack Vector
Network
Privileges Required
Low
Availability Impact to the Subsequent System
High
Confidentiality Impact to the Subsequent System
None
Integrity Impact to the Subsequent System
None
User Interaction
Active
Availability Impact to the Vulnerable System
High
Confidentiality Impact to the Vulnerable System
None
Integrity Impact to the Vulnerable System
None
CVSS Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Patched
  • >=0.3.47
Unaffected
  • <0.3.6
Affected Functions
Version
time::Date::parse
  • >=0.3.6, <0.3.47
time::OffsetDateTime::parse
  • >=0.3.6, <0.3.47
time::PrimitiveDateTime::parse
  • >=0.3.6, <0.3.47
time::Time::parse
  • >=0.3.6, <0.3.47
time::UtcDateTime::parse
  • >=0.3.38, <0.3.47
time::UtcOffset::parse
  • >=0.3.6, <0.3.47
time::parsing::Parsed::parse_item
  • >=0.3.6, <0.3.47

Description

Impact

When user-provided input is provided to any type that parses with the RFC 2822 format, a denial of service attack via stack exhaustion is possible. The attack relies on formally deprecated and rarely-used features that are part of the RFC 2822 format used in a malicious manner. Ordinary, non-malicious input will never encounter this scenario.

Patches

A limit to the depth of recursion was added in v0.3.47. From this version, an error will be returned rather than exhausting the stack.

Workarounds

Limiting the length of user input is the simplest way to avoid stack exhaustion, as the amount of the stack consumed would be at most a factor of the length of the input.

Advisory available under CC0-1.0 license.