CVE-2026-33699
published 2026-03-27CVE-2026-33699: pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an…
PriorityP344high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.46%
36.2th percentile
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | pypdf | < pypdf 6.9.2-1 (forky) | pypdf 6.9.2-1 (forky) |
| debian | pypdf2 | < pypdf 6.9.2-1 (forky) | pypdf 6.9.2-1 (forky) |
| py-pdf | pypdf | < 6.9.2 | 6.9.2 |
| pypdf_project | pypdf | < 6.9.2 | 6.9.2 |
| pypdf_project | pypdf | >= 0 < 6.9.2-1 | 6.9.2-1 |
| pypdf_project | pypdf | >= 0 < 6.9.2 | 6.9.2 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.04.6MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
osv4.6MEDIUM
vendor_debian4.6MEDIUM
vendor_redhat4.6MEDIUM
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Red Hat
pypdf: pypdf: Denial of Service via crafted PDF in non-strict mode
vendor_redhat·2026-03-26·CVSS 4.6
CVE-2026-33699 [MEDIUM] CWE-606 pypdf: pypdf: Denial of Service via crafted PDF in non-strict mode
pypdf: pypdf: Denial of Service via crafted PDF in non-strict mode
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
A flaw was found in pypdf. An attacker can craft a malicious PDF file that, when processed by pypdf in non-strict mode, triggers an infinite loop. This vulnerability can lead to a Denial of Service (DoS) by consuming excessive system resources, making the application unresponsive.
Mitigation: To mitigate this issue, avoid processing untrusted PDF files with pypdf, particularly when oper
Debian
CVE-2026-33699: pypdf - pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2...
vendor_debian·2026·CVSS 4.6
CVE-2026-33699 [MEDIUM] CVE-2026-33699: pypdf - pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2...
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
Scope: local
bookworm: open
forky: resolved (fixed in 6.9.2-1)
sid: resolved (fixed in 6.9.2-1)
trixie: open
OSV
CVE-2026-33699: pypdf is a free and open-source pure-python PDF library
osv·2026-03-27·CVSS 4.6
CVE-2026-33699 [MEDIUM] CVE-2026-33699: pypdf is a free and open-source pure-python PDF library
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
OSV
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
osv·2026-03-25
CVE-2026-33699 [MEDIUM] pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
### Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode.
### Patches
This has been fixed in [pypdf==6.9.2](https://github.com/py-pdf/pypdf/releases/tag/6.9.2).
### Workarounds
If users cannot upgrade yet, consider applying the changes from PR [#3693](https://github.com/py-pdf/pypdf/pull/3693).
GHSA
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
ghsa·2026-03-25
CVE-2026-33699 [MEDIUM] CWE-835 pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
### Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode.
### Patches
This has been fixed in [pypdf==6.9.2](https://github.com/py-pdf/pypdf/releases/tag/6.9.2).
### Workarounds
If users cannot upgrade yet, consider applying the changes from PR [#3693](https://github.com/py-pdf/pypdf/pull/3693).
No detection rules found.
No public exploits indexed.
2026-03-27
Published