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perl-5.42.0
⭐ Starred 2013 / TAP::Parser::Iterator
Security Advisories (5)
CVE-2026-4176 (2026-03-29)

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

CVE-2026-57432 (2026-07-13)

Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds. A template derived from untrusted input can read heap memory past the buffer and return it to the caller.

CVE-2026-13221 (2026-07-13)

Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perl_study_chunk. When such branches are combined into a trie, the delta between the first branch and the shared tail is stored in a 16-bit field. A branch count above 65535 overflows the field, and the trie's match decision table is truncated with no warning or error. A pattern of this shape produces false positive matches (matching strings it should not) and false negative matches (failing to match strings it should). When such a pattern gates an access or filtering decision, the result is wrong.

CVE-2026-15534 (2026-08-09)

Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch. The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject length plus one times the number of nodes. Nothing checks that product for positive overflow of the signed 32-bit count: a 286331153 byte subject matched against a pattern with 15 participating nodes stores the count as 14, leaving a two byte cache. The cache is then indexed from the real match position and node number, so reads go past the end of the allocation, and on failure CACHEsayNO sets a bit past it. A caller that matches an attacker controlled subject of this size against a pattern of this shape can crash the process or corrupt heap memory.

CVE-2026-8376 (2026-05-25)

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

NAME

TAP::Parser::Iterator - Base class for TAP source iterators

VERSION

Version 3.50

SYNOPSIS

# to subclass:
use TAP::Parser::Iterator ();
use base 'TAP::Parser::Iterator';
sub _initialize {
  # see TAP::Object...
}

sub next_raw { ... }
sub wait     { ... }
sub exit     { ... }

DESCRIPTION

This is a simple iterator base class that defines TAP::Parser's iterator API. Iterators are typically created from TAP::Parser::SourceHandlers.

METHODS

Class Methods

new

Create an iterator. Provided by TAP::Object.

Instance Methods

next

while ( my $item = $iter->next ) { ... }

Iterate through it, of course.

next_raw

Note: this method is abstract and should be overridden.

while ( my $item = $iter->next_raw ) { ... }

Iterate raw input without applying any fixes for quirky input syntax.

handle_unicode

If necessary switch the input stream to handle unicode. This only has any effect for I/O handle based streams.

The default implementation does nothing.

get_select_handles

Return a list of filehandles that may be used upstream in a select() call to signal that this Iterator is ready. Iterators that are not handle-based should return an empty list.

The default implementation does nothing.

wait

Note: this method is abstract and should be overridden.

my $wait_status = $iter->wait;

Return the wait status for this iterator.

exit

Note: this method is abstract and should be overridden.

my $wait_status = $iter->exit;

Return the exit status for this iterator.

SUBCLASSING

Please see "SUBCLASSING" in TAP::Parser for a subclassing overview.

You must override the abstract methods as noted above.

Example

TAP::Parser::Iterator::Array is probably the easiest example to follow. There's not much point repeating it here.

SEE ALSO

TAP::Object, TAP::Parser, TAP::Parser::Iterator::Array, TAP::Parser::Iterator::Stream, TAP::Parser::Iterator::Process,