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CVE-2026-49461 — pypdf: Possible large memory usage for form XObjects during text extraction

2026-09-29T00:46:51.858115+00:00

Affected: py-pdf pypdf

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. This vulnerability is fixed in 6.12.2.

GHSA-j543-4vmf-qm7v — pypdf: Possible large memory usage for form XObjects during text extraction

2026-09-29T00:46:51.858226+00:00

Affected: PyPI: pypdf

### Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references.

### Patches This has been fixed in [pypdf==6.12.2](https://github.com/py-pdf/pypdf/releases/tag/6.12.2).

### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3805](https://github.com/py-pdf/pypdf/pull/3805).

PYSEC-2026-3020 — pypdf: Possible large memory usage for form XObjects during text extraction

2026-09-29T00:46:51.858282+00:00

Affected: PyPI: pypdf

### Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references.

### Patches This has been fixed in [pypdf==6.12.2](https://github.com/py-pdf/pypdf/releases/tag/6.12.2).

### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3805](https://github.com/py-pdf/pypdf/pull/3805).