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Bug#1126575: pypdf: CVE-2026-24688

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Source: pypdf
Version: 5.4.0-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/py-pdf/pypdf/pull/3610
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for pypdf.

CVE-2026-24688[0]:
| pypdf is a free and open-source pure-python PDF library. An attacker
| who uses an infinite loop vulnerability that is present in versions
| prior to 6.6.2 can craft a PDF which leads to an infinite loop. This
| requires accessing the outlines/bookmarks. This has been fixed in
| pypdf 6.6.2. If projects cannot upgrade yet, consider applying the
| changes from PR #3610 manually.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-24688
    https://www.cve.org/CVERecord?id=CVE-2026-24688
[1] https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73
[2] https://github.com/py-pdf/pypdf/pull/3610
[3] https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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Bug#1126575: pypdf: CVE-2026-24688 Salvatore Bonaccorso <carnil@debian.org> - 2026-01-28 22:10 +0100

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