CVE-2026-54081 veraPDF Parser DoS via PostScript Type 1 Font Programs
Attackers can cause denial of service in veraPDF parser by submitting crafted PDFs with malicious Type 1 fonts that exhaust system resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54081?
CVE-2026-54081 is a medium-severity denial of service vulnerability in veraPDF-parser, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-1325
Which versions are affected by CVE-2026-54081?
4 open source packages ship an affected version, including org.verapdf:parser.
| Package | Affected | Fixed in |
|---|---|---|
org.verapdf:parser Maven | All versions | 1.30.2 |
org.verapdf:parser Maven | All versions | 1.30.2 |
org.verapdf:parser Maven | From 1.31.1 | 1.31.23 |
org.verapdf:parser Maven | From 1.31.1 | 1.31.23 |
How do I fix CVE-2026-54081?
Upgrade org.verapdf:parser to a fixed version for your release line: 1.30.2 or 1.31.23.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-54081 being exploited?
There is no known exploitation of CVE-2026-54081 in the wild and no public exploit code.
Sources
Also known as GHSA-7c26-995w-6f47.