How severe is CVE-2026-48735?

CVE-2026-48735 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-48735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48735?

CVE-2026-48735 affects Pypdf Project Pypdf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-48735?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-48735 have an EU (EUVD) identifier?

Yes. CVE-2026-48735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32912.

When was CVE-2026-48735 published?

CVE-2026-48735 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-48735

CVE-2026-48735 is a medium-severity vulnerability in Pypdf Project Pypdf with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 6.9
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32912
Weakness: CWE-770
Affected product: Pypdf Project Pypdf
Published: 2026-05-28
Last modified: 2026-06-17

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.

Frequently asked questions

What is CVE-2026-48735?: pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.
How severe is CVE-2026-48735?: CVE-2026-48735 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-48735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-48735?: CVE-2026-48735 affects Pypdf Project Pypdf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-48735?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-48735 have an EU (EUVD) identifier?: Yes. CVE-2026-48735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32912.
When was CVE-2026-48735 published?: CVE-2026-48735 was published on 2026-05-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*

More vulnerabilities in Pypdf Project Pypdf

CVE-2026-33699 — High (CVSS 7.5): pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an…
CVE-2026-27888 — High (CVSS 7.5): pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can…
CVE-2026-27628 — High (CVSS 7.5): pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can…
CVE-2025-62708 — High (CVSS 7.5): pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this…
CVE-2025-62707 — High (CVSS 7.5): pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this…
CVE-2025-55197 — High (CVSS 7.5): pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which…

All CVEs affecting Pypdf Project Pypdf →

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities

CVE-2026-31283 — Critical (CVSS 9.8): In Totara LMS v19.1.5 and before, the forgot password API does not implement rate limiting for the target email…
CVE-2020-37067 — Critical (CVSS 9.8): Filetto 1.0 FTP server contains a denial of service vulnerability in the FEAT command processing that allows attackers…
CVE-2021-47875 — Critical (CVSS 9.8): GeoGebra CAS Calculator 6.0.631.0 contains a denial of service vulnerability that allows attackers to crash the…
CVE-2025-11832 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling vulnerability in Azure Access Technology BLU-IC2, Azure Access…
CVE-2024-44241 — Critical (CVSS 9.8): The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.1 and iPadOS 18.1, macOS Sequoia…
CVE-2022-3439 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.

Browse all CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities →