# CPAN Net::IDN::Punycode vulnerabilities

Source: https://junglewise.ai/threats/technologies/net-idn-punycode  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/net-idn-punycode.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in CPAN Net::IDN::Punycode: 0 in the last 7 days and 5 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-87079, was published on 22 September 2026. Nothing in the last four weeks, down from 5 vulnerabilities in the four before. 0 critical against 2.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 5
- All time: 5 (2 critical, 0 exploited in the wild)

## About CPAN Net::IDN::Punycode

Perl library for encoding and decoding Internationalized Domain Names using Punycode.

## Latest CPAN Net::IDN::Punycode vulnerabilities

- [CVE-2026-87079: Net::IDN::Punycode CPU exhaustion via quadratic insertion cost](https://junglewise.ai/threats/cve-2026-87079-net-idn-punycode-versions-before-2-590-for-perl-allow-cpu) (high, CVSS 7.5, published 22 Sep 2026)
- [CVE-2026-87078: Net::IDN::Punycode memory leak in decode_punycode](https://junglewise.ai/threats/cve-2026-87078-net-idn-punycode-versions-from-2-302-before-2-590-for-perl-leak) (critical, CVSS 9.1, published 22 Sep 2026)
- [CVE-2026-74766: Net::IDN::Punycode heap use-after-free in decode_punycode](https://junglewise.ai/threats/cve-2026-74766-net-idn-punycode-versions-from-2-301-before-2-590-for-perl-allow) (high, CVSS 8.4, published 22 Sep 2026)
- [CVE-2026-74765: Net::IDN::Punycode integer overflow in delta accumulator](https://junglewise.ai/threats/cve-2026-74765-net-idn-punycode-versions-before-2-590-for-perl-allow-an-out-of) (medium, CVSS 6.5, published 22 Sep 2026)
- [CVE-2016-15059: Net::IDN::Punycode heap buffer overflow in encode_punycode](https://junglewise.ai/threats/cve-2016-15059-net-idn-punycode-versions-before-2-301-for-perl-allow-a-heap) (critical, CVSS 9.8, published 22 Sep 2026)

## Most severe CPAN Net::IDN::Punycode vulnerabilities

- [CVE-2016-15059: Net::IDN::Punycode heap buffer overflow in encode_punycode](https://junglewise.ai/threats/cve-2016-15059-net-idn-punycode-versions-before-2-301-for-perl-allow-a-heap) (critical, CVSS 9.8, published 22 Sep 2026)
- [CVE-2026-87078: Net::IDN::Punycode memory leak in decode_punycode](https://junglewise.ai/threats/cve-2026-87078-net-idn-punycode-versions-from-2-302-before-2-590-for-perl-leak) (critical, CVSS 9.1, published 22 Sep 2026)
- [CVE-2026-74766: Net::IDN::Punycode heap use-after-free in decode_punycode](https://junglewise.ai/threats/cve-2026-74766-net-idn-punycode-versions-from-2-301-before-2-590-for-perl-allow) (high, CVSS 8.4, published 22 Sep 2026)
- [CVE-2026-87079: Net::IDN::Punycode CPU exhaustion via quadratic insertion cost](https://junglewise.ai/threats/cve-2026-87079-net-idn-punycode-versions-before-2-590-for-perl-allow-cpu) (high, CVSS 7.5, published 22 Sep 2026)
- [CVE-2026-74765: Net::IDN::Punycode integer overflow in delta accumulator](https://junglewise.ai/threats/cve-2026-74765-net-idn-punycode-versions-before-2-590-for-perl-allow-an-out-of) (medium, CVSS 6.5, published 22 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 5 vulnerabilities in the four before. 0 critical against 2.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 5 | 2 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other CPAN technologies

- [CPAN Text::CSV XS](https://junglewise.ai/threats/technologies/cpan-text-csv-xs): 7 vulnerabilities
- [Cpanel::JSON::XS](https://junglewise.ai/threats/technologies/cpanel-json-xs): 7 vulnerabilities
- [CPAN Net::CIDR::Lite](https://junglewise.ai/threats/technologies/net-cidr-lite): 3 vulnerabilities
- [CPAN YAML-Syck](https://junglewise.ai/threats/technologies/yaml-syck): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "CPAN Net::IDN::Punycode vulnerabilities", https://junglewise.ai/threats/technologies/net-idn-punycode, 9 November 2026.