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CVE-2026-59936

pypdf: Possible infinite loop for not terminated inline images

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-59937

pypdf: Possible long runtimes for repeated malformed cross-reference entries

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-59938

pypdf: Possible large memory usage for wrong image dimensions

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with declared image size values that are much too large compared to the actual data, causing large memory usage in pypdf image parsing. This issue is fixed in version 6.14.0.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-71852

pypdf: Possible long runtimes/large memory usage for large CID font width ranges

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font /W width ranges or excessive width entries during text extraction. This issue is fixed in 6.15.0.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-71870

pypdf: Possible large memory usage for large /ToUnicode streams

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-82398

pypdf: Inefficient handling of non-whitespace inputs in read_until_whitespace

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/_utils.py function read_until_whitespace reads a stream containing a long run of bytes without whitespace. The function repeatedly performs immutable bytes concatenation in a one-byte loop, causing quadratic processing cost for the long non-whitespace input. This issue is fixed in version 6.15.0.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-115585

pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-115580

pypdf: Possible long runtimes for large xref table header limits

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-115572

pypdf: Possible long runtimes for repeated references to the same missing object

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that repeatedly references the same nonexistent indirect object, causing relevant file parts such as pages to trigger repeated full-file recovery loads and long runtimes when accessed. This issue is fixed in version 6.21.2.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf
CVE-2026-113786

pypdf: Unvalidated JPEG image data loading

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an unintended image parser when the image is loaded. Environments without the optional Pillow dependency are not affected. This issue is fixed in version 6.21.1.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Py-pdf
Products
Pypdf