CVE-2026-25727: time provides date and time handling in Rust

Routine

MEDIUM 6.5UPGRADE

CVE-2026-25727 is a medium-severity flaw (CVSS 6.5) affecting time. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

time provides date and time handling in Rust. From 0.3.6 to before 0.3.47, 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. A limit to the depth of recurs

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-02-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: time project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-06 20:16 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

time project time UPGRADE

Affected: >= 0.3.6 and < 0.3.47

Fixed in: 0.3.47

Safe to downgrade to: a release before 0.3.6

1. Check installed version

apt-cache policy time || rpm -q time || time --version

2. UPGRADE to 0.3.47 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade time

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade time

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.3.6 (Debian / Ubuntu)

apt-cache madison time sudo apt install time=<VERSION_BEFORE_0.3.6> sudo apt-mark hold time

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list time sudo dnf downgrade time-<VERSION_BEFORE_0.3.6> sudo dnf versionlock add time

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25727?

time: upgrade to 0.3.47. Exact commands for each OS are on this page.

Is CVE-2026-25727 being exploited?

CVE-2026-25727 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25727 affect?

CVE-2026-25727 affects time. Severity is medium (CVSS 6.5). time provides date and time handling in Rust. From 0.3.6 to before 0.3.47, 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

How urgent is CVE-2026-25727?

Priority 30/100. No elevated risk signals yet.

References

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