GHSA-FHP4-PR5J-46M5 is a high-severity null pointer dereference vulnerability in muhammara (npm), affecting versions <= 6.0.4. It is fixed in 6.0.5.
Summary A NULL pointer dereference vulnerability exists in PDFParser::CreateFilterForStream() when processing a PDF stream with /Filter /LZWDecode and a /DecodeParms dictionary that does not contain the EarlyChange key. This causes an access violation (0xC0000005) and crashes the process. Affected Version muhammara <= 6.0.4 (latest) Vulnerability Details File: src/deps/PDFWriter/PDFParser.cpp line 2107 When inDecodeParams is non-NULL but lacks the EarlyChange key: QueryDictionaryObject() returns NULL PDFObjectCastPtr<PDFInteger>(NULL) wraps NULL earlyObj->GetValue() dereferences NULL → crash PoC 460-byte malicious PDF triggers crash via startReadingFromStream(): PDF contains /Filter /LZWDecode with /DecodeParms << >> (empty, no EarlyChange) Exit code: 0xC0000005 (Access Violation) Fix Impact Any application accepting untrusted PDFs and using muhammara to read stream contents is vulnerable to DoS. Similar to: CVE-2022-41957, CVE-2022-39381 PoC File pocmuhammaralzwnull.js
The application dereferences a null pointer, causing a crash. Typical impact: denial of service via crash.
GHSA-FHP4-PR5J-46M5 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (6.0.5). Upgrading removes the vulnerable code path.
npm
muhammara (<= 6.0.4)muhammara → 6.0.5 (npm)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether GHSA-FHP4-PR5J-46M5 is reachable in your applications. Explore open-source security for your team.
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Already deployed Kodem? See GHSA-FHP4-PR5J-46M5 in your environment →Upgrade muhammara to 6.0.5 or later to resolve this vulnerability.
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GHSA-FHP4-PR5J-46M5 is a high-severity null pointer dereference vulnerability in muhammara (npm), affecting versions <= 6.0.4. It is fixed in 6.0.5. The application dereferences a null pointer, causing a crash.
GHSA-FHP4-PR5J-46M5 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
muhammara (npm) versions <= 6.0.4 is affected.
Yes. GHSA-FHP4-PR5J-46M5 is fixed in 6.0.5. Upgrade to this version or later.
Whether GHSA-FHP4-PR5J-46M5 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade muhammara to 6.0.5 or later.