CVE-2026-84310
published 2026-09-01CVE-2026-84310: pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume…
PriorityP411low3.3CVSS 3.1
AVLACLPRNUIRSUCNINAL
EPSS
0.14%
2.7th percentile
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| ansible-automation-platform-25 | lightspeed-chatbot-rhel8 | — | — |
| exploit-intelligence-tech-preview | vulnerability-analysis-rhel9 | — | — |
| lightspeed-core | lightspeed-stack-rhel9 | — | — |
| lightspeed-core | rag-tool-cpu-rhel9 | — | — |
| lightspeed-core | rag-tool-cuda-12.9-rhel9 | — | — |
| openshift-lightspeed-tech-preview | lightspeed-rag-tool-rhel9 | — | — |
| openshift-lightspeed | lightspeed-ocp-rag-rhel9 | — | — |
| py-pdf | pypdf | < 6.16.1 | 6.16.1 |
| pypdf_project | pypdf | < 6.16.1 | 6.16.1 |
| pypdf_project | pypdf | >= 0 < 6.16.1 | 6.16.1 |
| quay | quay-rhel8 | — | — |
| quay | quay-rhel9 | — | — |
| rhelai3 | bootc-cuda-rhel9 | — | — |
| rhelai3 | bootc-gaudi-rhel9 | — | — |
| rhelai3 | bootc-rocm-rhel9 | — | — |
| rhelai3 | disk-image-cuda-rhel9 | — | — |
| rhoai | odh-llama-stack-core-rhel9 | — | — |
| rhoai | odh-ogx-core-rhel9 | — | — |
CVSS provenance
nvdv3.13.3LOWCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
nvdv4.04.8MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
vendor_redhat4.8MEDIUM
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Red Hat
pypdf: pypdf: Denial of Service via crafted PDF outlines
vendor_redhat·2026-09-01·CVSS 4.8
CVE-2026-84310 [MEDIUM] CWE-770 pypdf: pypdf: Denial of Service via crafted PDF outlines
pypdf: pypdf: Denial of Service via crafted PDF outlines
A flaw was found in pypdf. A remote attacker could craft a malicious PDF document with specially designed outlines. Processing this document would cause the pypdf library to consume excessive processing time and memory, leading to a Denial of Service (DoS) condition. This vulnerability is due to a lack of limits on entry-count and nesting-depth during outline traversal.
Package: exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 (Exploit Intelligence) - Out of support scope
Package: lightspeed-core/lightspeed-stack-rhel9 (Lightspeed Core) - Fix deferred
Package: lightspeed-core/rag-tool-cpu-rhel9 (Lightspeed Core) - Fix deferred
Package: lightspeed-core/rag-tool-cuda-12.9-rhel9 (Lightspeed Core) - Fix deferred
Packa
VulDB
py-pdf pypdf up to 6.16.0 pypdf/_doc_common.py _get_outline resource consumption
vuldb·2026-09-01·CVSS 4.8
CVE-2026-84310 [MEDIUM] py-pdf pypdf up to 6.16.0 pypdf/_doc_common.py _get_outline resource consumption
A vulnerability described as problematic has been identified in py-pdf pypdf up to 6.16.0. This vulnerability affects the function _get_outline of the file pypdf/_doc_common.py. Executing a manipulation can lead to resource consumption.
This vulnerability is handled as CVE-2026-84310. The attack can be executed remotely. There is not any exploit available.
Upgrading the affected component is recommended.
GHSA
pypdf: Possible long runtimes/large memory usage when retrieving outlines
ghsa·2026-09-01
CVE-2026-84310 [MEDIUM] CWE-405 pypdf: Possible long runtimes/large memory usage when retrieving outlines
pypdf: Possible long runtimes/large memory usage when retrieving outlines
### Impact
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires accessing the outlines of a document with either lots of entries or nested outlines with long re-used nesting paths.
### Patches
This has been fixed in [pypdf==6.16.1](https://github.com/py-pdf/pypdf/releases/tag/6.16.1).
### Workarounds
If you cannot upgrade yet, consider applying the changes from PR [#3966](https://github.com/py-pdf/pypdf/pull/3966).
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-84310 python-pypdf: pypdf: Denial of Service via crafted PDF outlines [fedora-all]
bugzilla·2026-09-03·CVSS 4.8
CVE-2026-84310 [MEDIUM] CVE-2026-84310 python-pypdf: pypdf: Denial of Service via crafted PDF outlines [fedora-all]
CVE-2026-84310 python-pypdf: pypdf: Denial of Service via crafted PDF outlines [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.
Bugzilla
CVE-2026-84310 python-PyPDF2: pypdf: Denial of Service via crafted PDF outlines [fedora-all]
bugzilla·2026-09-03·CVSS 4.8
CVE-2026-84310 [MEDIUM] CVE-2026-84310 python-PyPDF2: pypdf: Denial of Service via crafted PDF outlines [fedora-all]
CVE-2026-84310 python-PyPDF2: pypdf: Denial of Service via crafted PDF outlines [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.
Bugzilla
CVE-2026-84310 pypdf: pypdf: Denial of Service via crafted PDF outlines
bugzilla·2026-09-01·CVSS 4.8
CVE-2026-84310 [MEDIUM] CVE-2026-84310 pypdf: pypdf: Denial of Service via crafted PDF outlines
CVE-2026-84310 pypdf: pypdf: Denial of Service via crafted PDF outlines
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.
2026-09-01
Published