GHSA-r6v5-fh4h-64xc

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GHSA-r6v5-fh4h-64xc

Summary: time vulnerable to stack exhaustion Denial of Service attack

Details: ### 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.

References: https://github.com/time-rs/time/security/advisories/GHSA-r6v5-fh4h-64xc, https://nvd.nist.gov/vuln/detail/CVE-2026-25727, https://github.com/time-rs/time/commit/1c63dc7985b8fa26bd8c689423cc56b7a03841ee, https://github.com/time-rs/time, https://github.com/time-rs/time/blob/main/CHANGELOG.md#0347-2026-02-05, https://github.com/time-rs/time/releases/tag/v0.3.47, https://rustsec.org/advisories/RUSTSEC-2026-0009.html