No exploitation reportedFix available

CVE-2026-59938

Q: Is CVE-2026-59938 actively exploited?

Active exploitation of CVE-2026-59938 has not been confirmed. Its EPSS score was 0.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-59938?

CVE-2026-59938 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

No exploitation reported by the sources we read.

Published2026-07-08
Fixed in6.14.0
WeaknessCWE-789

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2026-07-0818:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-59938?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-59938?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Pypdf project pypdf

Branch	Affected	Fixed in	Source
6.14	< 6.14.0	6.14.0	NVD · OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2026-59938 Red Hat Product Security11 known affected
pypdf: pypdf: Possible large memory usage for wrong image dimensions
exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 as a component of Exploit Intelligence · openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9 as a component of OpenShift Lightspeed · openshift-lightspeed/lightspeed-ocp-rag-rhel9 as a component of OpenShift Lightspeed · +8 more

Full record on NVD

Fix

Update Pypdf project pypdf to 6.14.0
Workaround from the vendor Red Hat Product Security CVE-2026-59938 · 11 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
No fix available, says the vendor Red Hat Product Security CVE-2026-59938 · 11 productsFix deferred

Advisories and patches

github.comPatch
github.comPatch
github.comRelease Notes
github.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-07-09
OpenCVESSVC decisionnone—
CNACVSS 4.06.9read 2026-10-23
NVDCVSS 3.15.3read 2026-10-23
CNAweakness (CWE)CWE-789read 2026-10-23
FIRST EPSSEPSS score0.5 %2026-10-22
OSVaffected packages—
GitHub Advisoriesadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 4.0 vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
Published: 2026-07-08
Last Modified: 2026-07-09
NVD status: Analyzed
GitHub Advisory: GHSA-5qjq-93h5-hrgp

Frequently asked questions

What is CVE-2026-59938?

Is CVE-2026-59938 actively exploited?

Active exploitation of CVE-2026-59938 has not been confirmed. Its EPSS score was 0.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-59938?

CVE-2026-59938 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

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