Linux Distros Unpatched Vulnerability : CVE-2026-74765

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Net::IDN::Punycode versions before 2.590 for Perl allow an out-of-bounds read via integer overflow of the delta accumulator in encodepunycode. The XS backend...

CVE-2026-87080

Net::IDN::Punycode::PP versions before 2.590 for Perl decode a truncated label to a name containing a character it never encoded in decodepunycode. The pure-Perl decoder reads one digit at a time with four-argument substr and tests the result with defined to detect the end of the input. substr on...

CVE-2026-74765: Integer Overflow or Wraparound

Net::IDN::Punycode versions before 2.590 for Perl allow an out-of-bounds read via integer overflow of the delta accumulator in encodepunycode. The XS backend keeps the punycode delta, and the digit index derived from it, in a signed int. The accumulation delta += m-n h+1 has no overflow check, so...

CVE-2026-87080: Improper Validation of Syntactic Correctness of Input

Net::IDN::Punycode::PP versions before 2.590 for Perl decode a truncated label to a name containing a character it never encoded in decodepunycode. The pure-Perl decoder reads one digit at a time with four-argument substr and tests the result with defined to detect the end of the input. substr on...

CVE-2026-87078: Missing Release of Memory after Effective Lifetime

Net::IDN::Punycode versions from 2.302 before 2.590 for Perl leak the output buffer on every rejected label in decodepunycode. The XS backend allocates the scalar it returns before it validates the input, sizing the buffer at twice the input length. The scalar is released only on the success path...

PT-2026-96671

Name of the Vulnerable Software and Affected Versions Net::IDN::Punycode::PP versions prior to 2.590 Description The decode punycode function in the pure-Perl decoder incorrectly handles truncated labels. The decoder uses a four-argument substr to read digits and checks the result with defined to...

CVE-2026-87079: Inefficient Algorithmic Complexity

Net::IDN::Punycode versions before 2.590 for Perl allow CPU exhaustion via quadratic insertion cost when decoding a long label in decodepunycode. The XS backend inserts each decoded code point into a UTF-8 buffer and finds the insertion point by scanning that buffer from the start, one character ...

CVE-2026-87082: Loop with Unreachable Exit Condition

Net::IDN::Punycode versions before 2.590 for Perl hang, crash or return a wrong label via unvalidated malformed UTF-8 in encodepunycode. Neither backend checks that its input is well-formed UTF-8, so a string with the UTF-8 flag set over malformed bytes, as the :utf8 PerlIO layer produces from an...

CVE-2026-87082

Net::IDN::Punycode versions before 2.590 for Perl hang, crash or return a wrong label via unvalidated malformed UTF-8 in encodepunycode. Neither backend checks that its input is well-formed UTF-8, so a string with the UTF-8 flag set over malformed bytes, as the :utf8 PerlIO layer produces from an...

Linux Distros Unpatched Vulnerability : CVE-2026-87078

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Net::IDN::Punycode versions from 2.302 before 2.590 for Perl leak the output buffer on every rejected label in decodepunycode. The XS backend allocates the scal...

Linux Distros Unpatched Vulnerability : CVE-2026-74766

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Net::IDN::Punycode versions from 2.301 before 2.590 for Perl allow a heap use-after-free via a decoded code point that reallocates the output buffer in...

Linux Distros Unpatched Vulnerability : CVE-2026-87079

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Net::IDN::Punycode versions before 2.590 for Perl allow CPU exhaustion via quadratic insertion cost when decoding a long label in decodepunycode. The XS backend...

PT-2026-96667

Net::IDN::Punycode versions from 2.301 before 2.590 for Perl allow a heap use-after-free via a decoded code point that reallocates the output buffer in decode punycode. The XS backend inserts each decoded code point into the string buffer of the scalar it returns. decode punycode computes the...

PT-2026-96669

Name of the Vulnerable Software and Affected Versions Net::IDN::Punycode versions 2.302 through 2.589 Description An issue exists in the XS backend where the output buffer is leaked whenever a label is rejected in the decode punycode function. The XS backend allocates a scalar before validating...

CVE-2016-15059

Net::IDN::Punycode versions before 2.301 for Perl allow a heap buffer overflow via unchecked writes past the output buffer in encodepunycode. The XS backend builds the encoded label in the string buffer of the scalar it returns, sized from the input length. The loop that emits the digits of each...

PT-2026-96666

Name of the Vulnerable Software and Affected Versions Net::IDN::Punycode versions prior to 2.590 Description An out-of-bounds read occurs in the XS backend due to an integer overflow of the delta accumulator within the encode punycode function. The XS backend stores the punycode delta and the...

CVE-2026-74766: Use After Free

Net::IDN::Punycode versions from 2.301 before 2.590 for Perl allow a heap use-after-free via a decoded code point that reallocates the output buffer in decodepunycode. The XS backend inserts each decoded code point into the string buffer of the scalar it returns. decodepunycode computes the...

Astra Linux – Vulnerability in curl

There is a vulnerability in the handling of certificate validation in curl v8.1.0, particularly in how wildcard patterns are matched when listed as “Subject Alternative Name” in TLS server certificates. Curls can be modified to use its own name matching function for TLS, rather than the one...

Nodemailer: IDN/Punycode domain allow-list bypass leads to email delivery to an attacker-controlled domain

Summary Nodemailer resolves an international IDN / non-ASCII recipient domain to a different Punycode xn-- label than every UTS‑46‑conformant parser web browsers, the WHATWG URL Standard, Node's url.domainToASCII, Python's idna. Its address normalizer normalizeAddress in lib/mime-node/index.js us...

JLSEC-2026-409

An improper certificate validation vulnerability exists in curl v8.1.0 in the way it supports matching of wildcard patterns when listed as "Subject Alternative Name" in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS...