PatchTheCVECVE-2018-12558: The parse() method in the Email::Address module through 1.909 for Perl is vulnerable to Algorithmic complexity
CVE-2018-12558 is a high-severity flaw (CVSS 7.5) affecting \. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The parse() method in the Email::Address module through 1.909 for Perl is vulnerable to Algorithmic complexity on specially prepared input, leading to Denial of Service. Prepared special input that caused this problem contained 30 form-field characters ("\f").
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.6% (top 14%) |
| CISA exploited list | No |
| Weakness | CWE-407 |
| Published | 2018-06-20 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2018-12558?
\: upgrade to newer than 1.909. Exact commands for each OS are on this page.
Is CVE-2018-12558 being exploited?
CVE-2018-12558 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-2018-12558 affect?
CVE-2018-12558 affects \. Severity is high (CVSS 7.5). The parse() method in the Email::Address module through 1.909 for Perl is vulnerable to Algorithmic complexity on specially prepared input, leading to Denial of Service. Prepared special input that caused this problem contained 30 form-fiel
How urgent is CVE-2018-12558?
Priority 53/100. High severity; Remotely exploitable, no login, no user action
Software pages
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