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build(deps): bump pypdf from 6.16.1 to 6.19.0 in /backend - #94

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Bumps pypdf from 6.16.1 to 6.19.0.

Release notes

Sourced from pypdf's releases.

Version 6.19.0, 2026-09-16

What's new

Security (SEC)

Deprecations (DEP)

Performance Improvements (PI)

Bug Fixes (BUG)

Full Changelog

Version 6.18.1, 2026-09-11

What's new

Security (SEC)

Bug Fixes (BUG)

Robustness (ROB)

Documentation (DOC)

Full Changelog

Version 6.18.0, 2026-09-07

What's new

Please note that this release requires users which previously overwrote the default limits to migrate to the new approach: Docs

In short:

  • Use apply_configuration as a context manager to temporarily overwrite configuration values.

... (truncated)

Changelog

Sourced from pypdf's changelog.

Version 6.19.0, 2026-09-16

Security (SEC)

  • Limit size of alphabetical page labels (#4096)

Deprecations (DEP)

  • Replace PdfWriter method add_js (#3979)

Performance Improvements (PI)

  • Move static value out of loop body for appearance stream data (#4087)
  • Reduce number of full data lookups for attachment mapping API (#4081)

Bug Fixes (BUG)

  • Do not copy unrelated pages when appending pages with non-terminal fields (#4078)
  • Use page reference for existing internal link targets (#4076)
  • Arabic-Indic digits are reversed during text extraction (#4077)
  • Parse a string rect for add_uri into a rectangle (#4074)

Full Changelog

Version 6.18.1, 2026-09-11

Security (SEC)

  • Further restrict FlateDecode recovery (#4073)
  • Limit entry count for TrueType and Type1 font /Widths (#4072)
  • Limit allowed length of tokens in parse_bfchar (#4071)

Bug Fixes (BUG)

  • Use current text matrix for visitor_text (#4062)
  • Repeat the letter for /S /A and /S /a page labels past Z (#4065)
  • Use font color for FreeText default appearance (#4051)

Robustness (ROB)

  • Fix compatibility with fonttools < 4.58.0 (#4050, #4059)

Documentation (DOC)

  • Use combined matrix in visitor examples (#4066)

Full Changelog

Version 6.18.0, 2026-09-07

Security (SEC)

  • Limit allowed length of indirect object tokens (#4055)

Deprecations (DEP)

  • Rework configuration value handling (#4044)

New Features (ENH)

  • Draw borders and backgrounds for appearance streams and annotations (#4033)

... (truncated)

Commits
  • d62cb58 REL: 6.19.0
  • 0d8b5a8 SEC: Limit size of alphabetical page labels (#4096)
  • 959467a PI: Move static value out of loop body for appearance stream data (#4087)
  • 20822b2 DEV: Bump zizmorcore/zizmor-action from 0.6.3 to 0.6.4 (#4093)
  • 25f2301 DEP: Replace PdfWriter method add_js (#3979)
  • a924438 BUG: Do not copy unrelated pages when appending pages with non-terminal field...
  • cf5cec2 BUG: Use page reference for existing internal link targets (#4076)
  • 96d81f0 BUG: Arabic-Indic digits are reversed during text extraction (#4077)
  • 2d21901 DEV: Fix Color class for latest mypy (#4082)
  • 893a010 MAINT: Split PdfDocCommon._flatten (#4070)
  • Additional commits viewable in compare view

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High-level PR Summary

This PR updates the pypdf dependency from version 6.16.1 to 6.19.0 in the backend requirements. The update includes important security fixes (limits on alphabetical page labels, FlateDecode recovery restrictions, font width entry limits, and token length restrictions), several bug fixes (page copying with non-terminal fields, text extraction for Arabic-Indic digits, internal link targets), performance improvements (appearance stream data handling, attachment mapping API), and a deprecation (replacement of the add_js method). This is a routine dependency maintenance update that brings security hardening and stability improvements to the PDF processing functionality.

⏱️ Estimated Review Time: 5-15 minutes

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1 backend/requirements.txt

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Bumps [pypdf](https://github.com/py-pdf/pypdf) from 6.16.1 to 6.19.0.
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.16.1...6.19.0)

---
updated-dependencies:
- dependency-name: pypdf
  dependency-version: 6.19.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Oct 8, 2026
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Commit: 5099125a371f2478b914ea389604cb0547ef3713

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Commit: 5099125a371f2478b914ea389604cb0547ef3713

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Commit: 5099125a371f2478b914ea389604cb0547ef3713

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Commit: 5099125a371f2478b914ea389604cb0547ef3713

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