Issues

• Empty /Filter [] makes stream decompression return empty bytes

  J-F-Liu/lopdf#672 · Filter by author JosephBARBIERDARNAL opened on Nov 13, 2026

• Quadratic text encoding in UnicodeMapEncoding (chars().count() per iteration + substr O(i))

  J-F-Liu/lopdf#666 · Filter by author A-Mavericks opened on Nov 11, 2026

• BrotliDecode drops per-filter predictor parameters (tested patch and PDF)

  J-F-Liu/lopdf#664 · Filter by author gregjotau opened on Nov 9, 2026

• ToUnicode: neighbouring codes with the same multi-unit target are coalesced, and the second one decodes with its last unit stepped ("ff" is read as "fg")

  J-F-Liu/lopdf#663 · Filter by author josephcrivello opened on Nov 5, 2026

• /StmF / /StrF /Identity (or absent) falls back to RC4 for V4/V5 encryption

  J-F-Liu/lopdf#623 · Filter by author dennisoehme opened on Oct 21, 2026

• Fuzzing: Issues found when testing public functions with random inputs

  J-F-Liu/lopdf#615 · Filter by author qarmin opened on Oct 18, 2026

• Encrypted PDFs: signature dictionary strings stay encrypted after load (/Contents is wrongly decrypted)

  J-F-Liu/lopdf#608 · Filter by author vaijira opened on Oct 16, 2026

• Strings in stream dictionaries are not decrypted (nor encrypted)

  J-F-Liu/lopdf#603 · Filter by author lolulo69 opened on Oct 13, 2026

• load_with_password/Document::decrypt silently derive the wrong key when given the owner password of an R2-R4 document with differing owner/user passwords

  J-F-Liu/lopdf#584 · Filter by author Abdulazizk89 opened on Oct 7, 2026

• SaveOptions.linearize is unused

  J-F-Liu/lopdf#581 · Filter by author ColonelThirtyTwo opened on Oct 4, 2026

• Save corrupts existing /Prev pointer and fails to load the document afterwards. The file opens fine with other viewers.

  J-F-Liu/lopdf#575 · Filter by author asifm91 opened on Sep 18, 2026

• Document::decrypt silently corrupts a document that load_mem has already decrypted

  J-F-Liu/lopdf#574 · Filter by author ningalooconsulting opened on Sep 14, 2026

• Add a document-wide xref entry budget for chained revisions

  J-F-Liu/lopdf#563 · Filter by author hayatosc opened on Aug 20, 2026

• Lazy / random-access document reading

  J-F-Liu/lopdf#554 · Filter by author kkollsga opened on Aug 9, 2026

• Make ttf-parser optional / migrate off it (unmaintained — RUSTSEC-2026-0192)

  J-F-Liu/lopdf#514 · Filter by author losrodriguez17 opened on Jun 30, 2026
  1

• Tests broken on main: document_load_performance references missing assets/test.pdf

  J-F-Liu/lopdf#511 · Filter by author zamf opened on Jun 29, 2026

• Claude Code review findings

  J-F-Liu/lopdf#494 · Filter by author qarmin opened on May 10, 2026
  1

• Better support for the non strict mode

  J-F-Liu/lopdf#484 · Filter by author rth opened on Mar 21, 2026

• [suggestion] Exclude assets from package?

  J-F-Liu/lopdf#466 · Filter by author tower120 opened on Feb 20, 2026

• Parse error when encoding is an indirect reference

  J-F-Liu/lopdf#463 · Filter by author mjul opened on Jan 6, 2026

• replace_text error

  bug
  J-F-Liu/lopdf#452 · Filter by author Geobert opened on Nov 24, 2025
  4

• lopdf fails to parse pages tree when Object Stream is missing from xref (but PDFium and PDF.js succeed!)

  bugparsing
  J-F-Liu/lopdf#449 · Filter by author segovb opened on Nov 6, 2025

• Incorrect character spacing with external font

  J-F-Liu/lopdf#448 · Filter by author pmahoney opened on Oct 21, 2025
  3

• Bookmarks don't generate due to resulting_document.renumber_objects() called too early in Docs

  J-F-Liu/lopdf#447 · Filter by author AurumTheEnd opened on Oct 17, 2025

• [Robust Improve Require] Incomplete pdf file crash the lib, but pdfium can parse it.

  bugparsing
  J-F-Liu/lopdf#446 · Filter by author nzinfo opened on Oct 4, 2025