pypdf is a free and open-source pure-python PDF library. Prior to 6.14.2, an attacker can craft a PDF with a page content stream containing a not terminated inline image that uses the ASCII85 or ASCIIHex filters, causing an infinite loop during parsing such as when extracting page text. This issue is fixed in version 6.14.2.
CVE-2026-59935
HIGHPre-NVD 8.78.7
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.7 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cna:github_m
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 8.7Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.7
- EG Score
- 8.7(low)
- EPSS
- —
- KEV
- Not listed
Published
July 8, 2026
Last Modified
July 8, 2026
Advisory Details (4)
Auto-updated Jul 8, 2026Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available
Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter) · Advisory · py-pdf/pypdf · GitHub
https://github.com/py-pdf/pypdf/security/advisories/GHSA-g867-7843-wf8qgithub_release Patch Available
Version 6.14.2, 2026-06-23
Patch available: py-pdf/pypdf 6.14.2
https://github.com/py-pdf/pypdf/releases/tag/6.14.2github_pr Patch Available
SEC: Avoid infinite loops for incomplete ASCII85 and ASCIIHex inline images
Patch available: py-pdf/pypdf 6.14.2 (PR #3892 merged 2026-06-23)
https://github.com/py-pdf/pypdf/pull/3892github_commit Patch Available
commit 5a33a46416aa (py-pdf/pypdf)
Patch available: py-pdf/pypdf 6.14.2 (contains commit 5a33a46416aa)
https://github.com/py-pdf/pypdf/commit/5a33a46416aa1ae6c025ff90a3cca57631fdafd2Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 2× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-08 19:46 UTCEG score recompute
- 2026-07-08 19:44 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-59935?
CVE-2026-59935 is a high vulnerability published on July 8, 2026. pypdf is a free and open-source pure-python PDF library. Prior to 6.14.2, an attacker can craft a PDF with a page content stream containing a not terminated inline image that uses the ASCII85 or ASCIIHex filters, causing an infinite loop during parsing such as when extracting page text. This issue…
When was CVE-2026-59935 disclosed?
CVE-2026-59935 was first published in the National Vulnerability Database on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-59935?
CVE-2026-59935 has a CVSS v3 base score of 8.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-59935?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59935, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-59935
Is Your Infrastructure Affected by CVE-2026-59935?
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