Answer in brief
CVE-2026-125107 records a High severity (CVSS 7.5) vulnerability in Muhammara has a NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key. The current sources do not mark it as known exploited. The current feed maps muhammara (npm), muhammara (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps muhammara (npm), muhammara (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| muhammaranpm | <=6.0.4 | 6.0.5 |
| muhammaranpm | >=0 <6.0.5 | 6.0.5 |
Published upstream
Jun 26, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Nov 9, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
## 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 ```cpp if (inDecodeParams) { PDFObjectCastPtr<PDFInteger> earlyObj( QueryDictionaryObject(inDecodeParams, "EarlyChange") ); early = earlyObj->GetValue(); // NULL dereference when EarlyChange key is absent } ``` When `inDecodeParams` is non-NULL but lacks the `EarlyChange` key: 1. `QueryDictionaryObject()` returns NULL 2. `PDFObjectCastPtr<PDFInteger>(NULL)` wraps NULL 3. `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 ```cpp if (earlyObj) early = earlyObj->GetValue(); ``` ## 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 [poc_muhammara_lzw_null.js](https://github.com/user-attachments/files/27186113/poc_muhammara_lzw_null.js)
Quoted source text, attributed separately from HOL analysis.