What is the CVSS score of CVE-2026-27888?

CVE-2026-27888 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Python are affected by CVE-2026-27888?

This vulnerability affects organizations using pypdf library versions prior to 6.7.3, allowing attackers to craft malicious PDFs that exhaust system RAM and cause application crashes or denial of…. A patch is available.

How to fix or mitigate CVE-2026-27888?

Within 24 hours: Identify all systems and applications using pypdf library and document current versions. Within 7 days: Test and deploy pypdf version 6.7.3 or later in development and staging environments. Within 30 days: Complete production deployment of patched version across all systems, prioritizing customer-facing and critical business services.

Python CVE-2026-27888

HIGH

Uncontrolled Resource Consumption (CWE-400)

2026-02-26 security-advisories@github.com

GHSA-x7hp-r3qg-r3cj

Python Pypdf Red Hat Suse

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SUSE

HIGH

qualitative

Red Hat

5.3 MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

Patch released

Feb 27, 2026 - 17:26 nvd

Patch available

CVE Published

Feb 26, 2026 - 01:16 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

3 pypi packages depend on pypdf (3 direct, 0 indirect)

Ecosystem-wide dependent count for version 6.7.3.

DescriptionGitHub Advisory

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the xfa property of a reader or writer and the corresponding stream being compressed using /FlateDecode. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

AnalysisAI

Denial of service in pypdf prior to version 6.7.3 allows remote attackers to exhaust system memory by crafting malicious PDF files that exploit FlateDecode-compressed streams accessed through the xfa property. The vulnerability requires no authentication or user interaction and affects any application processing untrusted PDF documents with the vulnerable library. Upgrade to pypdf 6.7.3 or later to remediate.

Technical ContextAI

Classified as CWE-400 (Uncontrolled Resource Consumption). Affects Pypdf. pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the xfa property of a reader or writer and the corresponding stream being compressed using /FlateDecode. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

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Same weakness CWE-400 – Uncontrolled Resource Consumption

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4.0

7.5

7.5

7.5

7.5

Vendor StatusVendor

SUSE

Severity: High

Product	Status
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openSUSE Tumbleweed	Fixed

CVE-2026-27888 vulnerability details – vuln.today

Back

Python CVE-2026-27888

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

Blast Radius

DescriptionGitHub Advisory

AnalysisAI

Technical ContextAI

RemediationAI

More in Python

Same weakness CWE-400 – Uncontrolled Resource Consumption

Vendor StatusVendor

SUSE

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External POC / Exploit Code