CVE-2026-74767
HighCVSS 8.7Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
Pandora contains a denial-of-service vulnerability in its handling of DAA (Direct Access Archive) files. When extracting the internal ISO image, compressed chunks are decompressed using zlib.decompress() without enforcing a limit on the resulting uncompressed data. An attacker can submit a crafted DAA file with highly compressed data, causing excessive memory and CPU consumption, potentially making the extraction worker unresponsive or terminating it, affecting service availability.
Risk Assessment
Risk of Pandora service unavailability, disrupting organizational operations and potentially causing financial or reputational damage.
Recommendation
Update Pandora to a patched version that introduces bounded decompression and raises a ZipBomb exception. Restrict DAA file uploads to trusted users only.
Other vulnerabilities in Pandora
See all- CVE-2026-88069Critical
Pandora contains a path traversal vulnerability in its archive extraction worker. When processing a specially crafted archive or disk image, attacker-controlled file paths could be used without ensuring that the resulting destination remained within the intended extraction directory. An attacker able to submit a malicious file for analysis could use path traversal sequences or crafted paths to cause extracted content to be written outside the designated extraction directory, potentially overwriting files accessible to the Pandora worker process.
- CVE-2026-74764Critical
Pandora contains a path traversal vulnerability in its TAR archive extraction functionality. When processing a TAR archive, member names are passed directly to Python's tarfile.TarFile.extract() without an extraction filter. An attacker can submit a crafted TAR archive with malicious paths, allowing files to be written outside the intended directory.
- CVE-2026-75531High
Pandora contains a stored XSS vulnerability in the rendering of URL observables. A malicious URL can be injected into the inline JavaScript onclick handler, allowing arbitrary JavaScript execution in the application context.
- CVE-2026-75529Medium
Pandora is affected by a stored XSS vulnerability in the PDF download functionality. The /task-download/<task_id>/.../pdf endpoint verifies the file is a PDF but returns it without explicit MIME type, allowing it to be served as HTML or another active format. A crafted PDF/polyglot can execute script in the Pandora application context.
Original NVD description (English source)
Pandora contains a denial-of-service vulnerability in its handling of DAA (Direct Access Archive) files. When extracting the internal ISO image from a DAA archive, compressed chunks were decompressed using zlib.decompress() without enforcing a limit on the resulting uncompressed data. An attacker able to submit a crafted DAA file containing highly compressed data could cause Pandora to decompress a relatively small input into a very large amount of data in memory. Because the decompressed chunks are accumulated to construct the internal ISO image, this could result in excessive memory consumption and potentially CPU exhaustion, causing the extraction worker to become unresponsive, terminate, or affect the availability of the Pandora service. The patch introduces bounded decompression using decompressobj().decompress() with max_extracted_filesize, verifies the cumulative size of decompressed chunks, and raises a dedicated ZipBomb exception when the configured limit is exceeded. Pandora then aborts extraction and reports the file as too large.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS