Is CVE-2026-24688 in the CISA KEV catalog?

No. CVE-2026-24688 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-24688?

CVE-2026-24688 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2026-24688?

CVE-2026-24688 has an EPSS score of 0.39% (31th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-24688?

Upgrade pypdf on debian unstable to 6.9.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-24688

MEDIUM

4.3

CVSS v3

NVD

Description

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.

CWE-835

How to fix

Remediation Available

pypdfDebian

Fixed in:6.9.0-1CVE-2026-24688

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploit Intelligence

0.39%probability of exploitation in 30 days

31stpercentile

Low risk: more likely to be exploited than 31% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Issue Tracking1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix
CVE-2024-20353	High	8.6	63%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-25.