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veraPDF-parser CVE-2026-54081

| EUVDEUVD-2026-50372 MEDIUM
Improperly Controlled Sequential Memory Allocation (CWE-1325)
2026-07-29 GitHub_M GHSA-7c26-995w-6f47
Java Information Disclosure Verapdf Parser
6.9
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
vuln.today AI
7.5 HIGH

Network-reachable via PDF submission with no authentication (PR:N); A:H because unbounded allocation and infinite loops can fully crash the JVM validator process, not merely degrade it.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jul 29, 2026 - 16:02 EUVD
Source Code Evidence Fetched
Jul 29, 2026 - 15:51 vuln.today
Analysis Generated
Jul 29, 2026 - 15:51 vuln.today

DescriptionCVE.org

veraPDF PDF parser is a PDF parser for veraPDF. Prior to 1.30.2 and 1.31.23, veraPDF-parser contains a denial-of-service vulnerability in veraPDF-parser/src/main/java/org/verapdf/pd/font/type1/Type1FontProgram.java and veraPDF-parser/src/main/java/org/verapdf/parser/postscript/PSOperator.java, where a crafted Type 1 font /FontDescriptor /FontFile program can execute unbounded PostScript array allocation, a zero-increment for loop, or self-recursive toExecute user dictionary lookups and exhaust validator memory, CPU, or stack. This issue is fixed in versions 1.30.2 and 1.31.23.

AnalysisAI

Denial-of-service in veraPDF-parser allows a remote unauthenticated attacker to crash or hang the PDF validation service by submitting a crafted PDF containing a Type 1 font whose /FontDescriptor /FontFile PostScript program exploits one of three unbounded resource primitives: a massive array allocation, a zero-increment for-loop, or a self-referential recursive user-dictionary lookup. All veraPDF-parser releases prior to 1.30.2 and 1.31.23 are affected across both active version branches. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Submit crafted PDF via upload endpoint
Delivery
veraPDF parses Type 1 font /FontFile PostScript stream
Exploit
Trigger unbounded array allocation, zero-increment loop, or recursive toExecute lookup
Execution
Exhaust JVM heap, CPU, or call stack
Impact
Validator process crashes or hangs indefinitely
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Vulnerability AssessmentAI

Exploitation Exploitation requires the target to be running veraPDF-parser prior to 1.30.2 or 1.31.23 and processing a PDF that the attacker can influence. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.9 (Medium) reflects a network-reachable, unauthenticated DoS with no confidentiality or integrity impact (VC/VI/VA: N/N/L, SC/SI/SA: N/N/N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker submits a PDF to a public-facing document validation service running veraPDF (e.g., a compliance portal or document upload API). The PDF contains a Type 1 font whose /FontFile stream is a PostScript program beginning with `2147483647 array` - the validator unconditionally parses this font, attempts to allocate a 16 GB Java ArrayList, exhausts JVM heap, and crashes the validation service. …
Remediation Upgrade to veraPDF-parser 1.30.2 (for 1.30.x deployments) or 1.31.23 (for 1.31.x deployments), as confirmed by the vendor advisory at https://github.com/veraPDF/veraPDF-parser/security/advisories/GHSA-7c26-995w-6f47 and implemented in PR #703 (https://github.com/veraPDF/veraPDF-parser/pull/703) and commits 73d6ec0 and cb35386. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-54081 vulnerability details – vuln.today
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