GitHub Advisoryadvisory · crates.io

GHSA-r6v5-fh4h-64xc time vulnerable to stack exhaustion Denial of Service attack

MEDIUM Published 2026-02-05 Modified 2026-02-23 Official page ↗
Aliases
CVE-2026-25727
Ecosystem
crates.io
Packages
time
Severity
Moderate
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
Weaknesses
CWE-121
Reviewed
2026-02-05

Affected packages

• crates.io time: >= 0.3.6, < 0.3.47 → fixed in 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. Alternatively, avoiding the format altogether would also ensure that the vulnerability is not encountered. To do this, add ```toml disallowed-types = ["time::format_description::well_known::Rfc2822"] ``` to your `clippy.toml` file. This will trigger the `clippy::disallowed_types` lint, which is warn-by-default and can be explicitly denied.

Related

Alias · CVE (1)

  • CVE-2026-25727 time provides date and time handling in Rust. vulnerability

Weakness · CWE (1)

  • CWE-121 Stack-based Buffer Overflow weakness

References