libical

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• documention bug [README.md] - linkrot / file moved.

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  Difficulty 1/5 Under an hour Newbie friendliness 76/100

  libical/libical#1445 · Opened Oct 10, 2026

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• `icalparser_clean()` returns its root component without clearing the parser's reference — freeing the returned component and then the parser is a heap use-after-free (double free)

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  Difficulty 3/5 Half a day Newbie friendliness 35/100

  libical/libical#1444 · Opened Oct 9, 2026

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• Line-buffer ownership documentation disagrees with icalparser_add_line() and icalparser_get_line()

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  Difficulty 3/5 Half a day Newbie friendliness 35/100

  libical/libical#1443 · Opened Oct 9, 2026

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• icalparser_clean() leaves per-input state behind when reusing a parser

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  libical/libical#1442 · Opened Oct 9, 2026

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• Request for GHSA/CVE for the vCard VALUE type confusion fixed in v4.0.6 (PR #1375)

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  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  libical/libical#1438 · 5 comments · Opened Oct 3, 2026

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• Should we drop support for RFC 2445?

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  Difficulty 5/5 Over a week Newbie friendliness 30/100

  libical/libical#1343 · 4 comments · Opened Jul 1, 2026

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• Known limitations related to YEARLY BYxxx rule combinations

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  libical/libical#1276 · 3 comments · Opened Mar 12, 2026

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• Fix the vzic test-parse

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  vzic

  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  libical/libical#1207 · Opened Jan 10, 2026

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• Fix the vzic test-changes

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  vzic

  Difficulty 3/5 Half a day Newbie friendliness 45/100

  libical/libical#1206 · Opened Jan 10, 2026

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• regression test is failing with macos-14

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  Difficulty 3/5 Half a day Newbie friendliness 25/100

  libical/libical#1132 · 2 comments · Opened Nov 9, 2025

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• Always build libicalvcard and deprecate libicalvcal

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  Difficulty 5/5 Over a week Newbie friendliness 20/100

  libical/libical#763 · 4 comments · Opened Oct 1, 2024

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• Missing C++ bindings for libicalvcard

  May be free again @ksmurchison claimed this 747 days ago, and no pull request is open. Open

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  bindings

  libical/libical#748 · 1 comment · 1 assignee · Opened Sep 24, 2024

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• Add documentation on multithreading

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  documentation

  Difficulty 3/5 1-2 days Newbie friendliness 48/100

  libical/libical#673 · Opened Mar 31, 2024

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• Documentation missing for recurrence BY_*_ARRAY

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  documentation

  Difficulty 2/5 1-3 hours Newbie friendliness 48/100

  libical/libical#587 · 6 comments · Opened Sep 4, 2022

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• CMake option for CUSTOM_MALLOC

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  buildsystem

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  libical/libical#553 · 4 comments · Opened Mar 5, 2022

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• Generate source using flex+bison

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  buildsystem

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  libical/libical#504 · Opened Aug 15, 2021

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• Parser strips trailing white-space on (TEXT) property value

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  Difficulty 3/5 1-2 days Newbie friendliness 42/100

  libical/libical#497 · 1 comment · Opened Jun 5, 2021

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• Parse_MIME fails to parse VCard when the SORT-AS parameter contains quotes

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  vCard

  Difficulty 3/5 1-2 days Newbie friendliness 25/100

  libical/libical#490 · 4 comments · Opened Apr 12, 2021

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• Parse_MIME fails to parse VCard with pref parameter

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  vCard

  Difficulty 4/5 3-5 days Newbie friendliness 28/100

  libical/libical#488 · 2 comments · Opened Apr 1, 2021

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• ICAL_ALLOW_EMPTY_PROPERTIES=true allows invalid events

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  libical/libical#476 · 12 comments · Opened Jan 29, 2021

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• Improve exception safety with smart pointers

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  libical/libical#459 · 2 comments · Opened Dec 14, 2020

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• Expose timezones outside of zones.tab

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 30/100

  libical/libical#432 · 3 comments · 1 reaction · Opened Jul 2, 2020

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• Try to guess whether the user wants to modify only this, this and future or all instances of recurring events/tasks

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  libical/libical#425 · 4 comments · Opened Mar 18, 2020

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• Offer compression for RRULE:BYDAY

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  enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  libical/libical#424 · 4 comments · Opened Mar 18, 2020

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• Missing escaping of special characters

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  vCard

  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  libical/libical#417 · Opened Nov 21, 2019

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• Clean TODOs

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  Difficulty 5/5 Over a week Newbie friendliness 20/100

  libical/libical#378 · 8 comments · Opened May 10, 2019

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• Enhancement: R bindings

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  bindings enhancement help wanted

  Difficulty 5/5 Over a week Newbie friendliness 20/100

  libical/libical#361 · 1 comment · Opened Nov 12, 2018

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• Parse_MIME does not properly deal with Unicode

  May be free again A pull request for this issue was closed without being merged. Open

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  vCard

  Difficulty 4/5 3-5 days Newbie friendliness 22/100

  libical/libical#353 · 6 comments · Opened Aug 22, 2018

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• Invalid \r\r character added if the last \r\n falls on the 75th octet by fold_property_line

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  Difficulty 3/5 1-2 days Newbie friendliness 52/100

  libical/libical#347 · 1 comment · Opened May 14, 2018

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• Add support for SHARE-SCOPE on X-props

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  libical/libical#344 · 4 comments · Opened Apr 28, 2018

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• Random enumeration ordering

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  libical/libical#343 · 11 comments · Opened Apr 28, 2018

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• Perl Bindings

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  bindings enhancement help wanted

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  libical/libical#202 · Opened Jun 14, 2015

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• PHP Bindings

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  bindings enhancement help wanted

  Difficulty 4/5 3-5 days Newbie friendliness 20/100

  libical/libical#200 · Opened Jun 14, 2015

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• Multiple Categories not collapsed to single entry [sf#77]

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  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  libical/libical#77 · 10 comments · Opened May 31, 2014

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• Resources property bug with commas [sf#79]

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  libical/libical#79 · Opened May 31, 2014

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• problem with escaping commas handling multiple categories [sf#75]

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  Difficulty 3/5 1-2 days Newbie friendliness 30/100

  libical/libical#75 · 2 comments · Opened May 31, 2014

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• Fuzz: timeout in vcardtextlist_new_from_string()

  Possibly taken @rsto claimed this 23 days ago. Open

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  libical/libical#1415 · 2 comments · 2 assignees · Opened Sep 18, 2026

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