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perl-5.40.5
⭐ Starred 2013 / Pod::Html::Util
Security Advisories (3)
CVE-2025-40909 (2025-05-30)

Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running. This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

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-2026-19487 (2026-08-13)

Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass. The prescan walks the subject for positions where the full pattern could match, and the engine tries it from the leftmost one recorded. A failing transition sets the failed flag, and a later successful transition does not clear it, so the prescan reads the stale flag as a failure and stops before it can record a candidate that starts earlier. It takes a subject where one candidate is recorded and a later character then forces a fallback through a fail link that succeeds. Example: "ABCDE" =~ m/ABCF|BCDE|C/; # matches C at offset 2, not BCDE "ABCDE" =~ m/ABCF|BCDE|C(G)/; # no match, BCDE missed An alternation like this can miss input it should match, or match it on the wrong branch, so an access or filtering decision made from the result can be wrong.

NAME

Pod::Html::Util - helper functions for Pod-Html

SUBROUTINES

Note: While these functions are importable on request from Pod::Html::Util, they are specifically intended for use within (a) the Pod-Html distribution (modules and test programs) shipped as part of the Perl 5 core and (b) other parts of the core such as the installhtml program. These functions may be modified or relocated within the core distribution -- or removed entirely therefrom -- as the core's needs evolve. Hence, you should not rely on these functions in situations other than those just described.

process_command_line()

Process command-line switches (options). Returns a reference to a hash. Will provide usage message if --help switch is present or if parameters are invalid.

Calling this subroutine may modify @ARGV.

usage()

Display customary Pod::Html usage information on STDERR.

unixify()

Ensure that Pod::Html's internals and tests handle paths consistently across Unix, Windows and VMS.

relativize_url()

Convert an absolute URL to one relative to a base URL. Assumes both end in a filename.

html_escape()

Make text safe for HTML.

htmlify()

htmlify($heading);

Converts a pod section specification to a suitable section specification for HTML. Note that we keep spaces and special characters except ", ? (Netscape problem) and the hyphen (writer's problem...).

anchorify()

anchorify(@heading);

Similar to htmlify(), but turns non-alphanumerics into underscores. Note that anchorify() is not exported by default.

trim_leading_whitespace()

Remove any level of indentation (spaces or tabs) from each code block consistently. Adapted from: https://metacpan.org/source/HAARG/MetaCPAN-Pod-XHTML-0.002001/lib/Pod/Simple/Role/StripVerbatimIndent.pm