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Graph/pdf-font-subsetting-gibberish

Pattern

PDF Text Gibberish Copy-Paste

pdf-font-subsetting-gibberish

Font subsetting or inconsistent font embedding in generated PDFs causes text to display or extract as gibberish—especially in form fields—so copied content breaks across viewers because Unicode-to-glyph mapping is lost.

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Updated5/30/2026

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30 linked nodes

DataCloneError: parse(a,m,f={}){let{context:s,generateRules:l}=dI(f),c=Wm(ws,e,f);c.astFormat in vv&&(f.printer=vv[c.astFormat]......d} could not be cloned. — While saving any file. Tension: Error formatting document. Outcome: Formatting completed in 11ms.

on a non-headless browser. Outcome: I need to make the clipboard contents equal to a list so that I can paste tabular data on the page.

the text and headings shift slightly upward compared to English — when switching to Arabic (RTL).

PDFs generated by spatie/laravel-pdf lose the stylesheet after deployment

strcpy(overflowing, overflowingtext) does not reliably overflow into p1

it works fine for embedding data into the image but struggles to take the data out — The data inside the image is just text. Tension: the text is not a coherent word. Outcome: You should write the pixel once after changing all three values.

There is no way to distinguish %PDF-i`*`fect from %PDF-i`*`fect — during file uploads to prevent Cross-Site Scripting(XSS). Tension: Generally no way to know for certain if a client has a virus/trojan or viral/trojan files for uploading. Outcome: You can only tell once the file has been uploaded where you can run diagnostics in your lab.

Sanitized text is rendered using jQuery .html(), resulting in plain text output instead of the expected HTML content formatting/sanitization behavior.

Once the document has been opened and decrypted successfully — a conforming reader. Tension: There is nothing inherent in PDF encryption that enforces the document permissions specified in the encryption dictionary. Outcome: a conforming reader technically has access to the entire contents of the document.

admin password security mechanism in PDFs

whatever HTML or javascript, or C# code I input there as a message, it's simply rendered as plain text — rendering it as a string again (the strings are saved to a string array, loops in the .razor file, and rendered in a ` ` tag). Tension: I'm not using any form of input/output sanitzation. Outcome: I believe my implementation may be vuln erable to XSS attacks.

On macOS, Cmd+V paste does not work for pasting OTP code into an OTP input component, while right-click → Paste works.

certain characters from various languages or scripts either fail to render or result in inaccurate glyphs — generating PDFs in my project using libraries such as `@react-pdf/renderer` and `pdf-lib,`. Tension: copying and pasting the content elsewhere often results in gibberish, likely due to mismatched glyphs or incorrect Unicode encoding. Outcome: The single font that has most languages is one of the Noto Fonts like Noto Sans.

the page just did not render and all page turn to grey blank — set the VariableSizeList width to 100% and height auto fit with different TeXPDFPage count. Tension: Am I misssing something? what should I do to set the VariableSizeList width and height corrently? Outcome: finally I round the AutoResizer outer level need the div element to take place the position.

I copy the information (text + image) to the user's clipboard. — export structured data (like image + text) to Apple Notes from a web app. Tension: This solution is not very user-friendly and requires manual intervention. Outcome: This allows the user to select Apple Notes as the app where the content will be saved.

the file name contains utf-8 characters it looks like: =?utf-8?Q?Sz=C3=A1mla.docx?= — String fileName = part.getFileName();. Tension: it looks like: =?utf-8?Q?Sz=C3=A1mla.docx?=.

it displays gibberish characters instead of the actual text — to create a PDF with form fields and embed a custom TrueType font (FreeSans.ttf) with subsetting enabled. Tension: Never subset the font for acroform fields.

Non-editable JavaFX TextFields are not getting the intended gray text color when the styling is declared in a global CSS stylesheet. More specific CSS rules for certain panels override the :readonly styling.

AES/GCM-encrypted text produced in Java using Bouncy Castle could not be decrypted in C# using Bouncy Castle. Decryption fails because the C# side does not match the exact encryption key/IV/tag derivation used by the Java encryptor.

skaffold scrambles the Log output of the build — skaffold v2.13.2 on Windows 10. Tension: This is not just an aesthetic problem. Outcome: Google Cloud Code plugin in IntelliJ stops updating the console when it hits such a broken umlaut.

Mustang validator reports a content stream resource error for font F1

The issue I am seeing is that the resolution decreases significantly during this process. — The program converts the PDF to JPG, performs the "slicing" action, then converts it back to PDF for printing. Tension: I did some research and saw that the PDFBox tools is able to set the DPI of the JPG during conversion from PDF, which I did using some code from AI, however it did not help the resolution. Outcome: My son said to convert to PNG which is lossless and, again I had AI write me some code which also didn't seem to work.

it creates one large page that’s the height of A4 (portrait) and the width of A4 (landscape) — when I generate a PDF (using chrome). Tension: rather than separate pages with mixed orientations. Outcome: Printing a PDF with mixed orientations is not possible with just chrome.

A generated PDF intended to be PDF/UA-compliant consistently fails the PAC checker with the error "Test Object Not Tagged." The checker indicates required accessibility tagging is not being recognized.

takes user-controlled PostScript parameters (upWriteComponentCommands, upYMoveCommand) and passes them DIRECTLY as the format string argument — Ghostscript 'uniprint' device (devices/gdevupd.c). Tension: Attacker-supplied %s/%x/%n conversion specifiers yield arbitrary read & write primitives, bypassing -dSAFER and leading to RCE on a victim that renders a malicious PostScript/PDF. Outcome: upWriteComponentCommands, upYMoveCommand) and passes them DIRECTLY as the format string argument to gp_fprintf and gs_snprintf inside upd_wrtrtl (lines 7021, 7028, 7049, 7053) and similar writer functions.

Ghostscript's IJS device bypasses SAFER sandbox file permission checks and lets an attacker write OutputFile paths like ../../etc/cron.d/backdoor

Ghostscript 9.50 (psi/zfsample.c) has a use-after-free in sampled_data_finish — compacting/moving GC. Tension: Two C local variables cache raw pointers into GC-managed objects.

When converting a markdown document to PDF via pandoc + tectonic. Outcome: Conversion succeeds for almost the entire document, then breaks at one specific spot.

the screen renders as a uniform cyan blob — Authoring an emissive screen prop (datapad, monitor, LED readout) in Blender's Principled BSDF. Tension: the painted grid, text, and icons on the texture are completely washed out. Outcome: The rest of the prop (case, bezel) looks fine; only the emissive face looks broken.

Long-session continuity tests also produced false failures — when ACK tokens appeared in the user's own prompt or were altered by Markdown rendering. Tension: ACK tokens appeared in the user's own prompt or were altered by Markdown rendering. Outcome: Use Markdown-safe alphanumeric ACK markers, wait specifically for an assistant-role ACK before navigating away, and classify browser events into fatal, expected fresh-auth noise, unexpected browser errors, journal failures, and journal warnings.

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