CVE-2026-48155 - Vulnerability Details - OpenCVE

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

References

Link	Providers
https://github.com/py-pdf/pypdf/pull/3790
https://github.com/py-pdf/pypdf/releases/tag/6.12.0
https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8

History

Thu, 28 May 2026 16:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 28 May 2026 15:30:00 +0000

Type	Values Removed	Values Added
Description		pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.
Title		pypdf: Possible large memory usage for large offsets for layout mode text
Weaknesses		CWE-400
References		https://github.com/py-pdf/pypdf/pull/3790 https://github.com/py-pdf/pypdf/releases/tag/6.12.0 https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8
Metrics		cvssV4_0 `{'score': 4.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-05-28T14:51:49.411Z

Updated: 2026-05-28T15:57:54.367Z

Reserved: 2026-05-20T23:12:43.031Z

Link: CVE-2026-48155

Vulnrichment

Updated: 2026-05-28T15:57:50.832Z

NVD

Status : Received

Published: 2026-05-28T16:16:28.890

Modified: 2026-05-28T16:16:28.890

Link: CVE-2026-48155

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48155", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-20T23:12:43.031Z", "datePublished": "2026-05-28T14:51:49.411Z", "dateUpdated": "2026-05-28T15:57:54.367Z"}, "containers": {"cna": {"title": "pypdf: Possible large memory usage for large offsets for layout mode text", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8"}, {"name": "https://github.com/py-pdf/pypdf/pull/3790", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/pull/3790"}, {"name": "https://github.com/py-pdf/pypdf/releases/tag/6.12.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/releases/tag/6.12.0"}], "affected": [{"vendor": "py-pdf", "product": "pypdf", "versions": [{"version": "< 6.12.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-28T14:51:49.411Z"}, "descriptions": [{"lang": "en", "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0."}], "source": {"advisory": "GHSA-cj93-chg6-vgv8", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-28T15:57:44.616233Z", "id": "CVE-2026-48155", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T15:57:54.367Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48155", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-20T23:12:43.031Z", "datePublished": "2026-05-28T14:51:49.411Z", "dateUpdated": "2026-05-28T15:57:54.367Z"}, "containers": {"cna": {"title": "pypdf: Possible large memory usage for large offsets for layout mode text", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8"}, {"name": "https://github.com/py-pdf/pypdf/pull/3790", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/pull/3790"}, {"name": "https://github.com/py-pdf/pypdf/releases/tag/6.12.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/py-pdf/pypdf/releases/tag/6.12.0"}], "affected": [{"vendor": "py-pdf", "product": "pypdf", "versions": [{"version": "< 6.12.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-28T14:51:49.411Z"}, "descriptions": [{"lang": "en", "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0."}], "source": {"advisory": "GHSA-cj93-chg6-vgv8", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-48155", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-28T15:57:44.616233Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T15:57:50.832Z"}}]}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0."}], "id": "CVE-2026-48155", "lastModified": "2026-05-28T16:16:28.890", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-28T16:16:28.890", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/pull/3790"}, {"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/releases/tag/6.12.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security-advisories@github.com", "type": "Primary"}]}