# CVE-2026-33809: Go Images vulnerable to an out-of-memory error via a crafted TIFF file

Source: https://junglewise.ai/threats/cve-2026-33809-go-images-vulnerable-to-an-out-of-memory-error-via-a-crafted-tiff  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-25. Updated: 2026-05-11  
License: CC BY 4.0 with a link back

CVE-2026-33809 · Severity: medium · CVSS 5.3 · Published 2026-03-25

A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing either excessive resource consumption or an out-of-memory error.

Technologies: [golang.org/x/image (Go)](https://junglewise.ai/threats/technologies/golang-org-x-image). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-33809 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33809 being exploited in the wild.

**How severe is CVE-2026-33809?** Medium severity, with a CVSS score of 5.3, published 25 March 2026.

**Which products and versions are affected?** golang.org/x/image (Go) < 0.38.0, SEMVER:introduced=0,fixed=0.38.0.

**Is there a fix for CVE-2026-33809?** Yes. golang.org/x/image (Go): upgrade to 0.38.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-33809?** Check whether you run golang.org/x/image (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- golang.org/x/image (Go): upgrade to 0.38.0 or later

  ```sh
  go get golang.org/x/image@v0.38.0
  ```


## Affected products

- golang.org/x/image (Go) < 0.38.0, SEMVER:introduced=0,fixed=0.38.0

## Identifiers

- CVE-2026-33809
- GHSA-44p7-9xx4-hf2g
- GO-2026-4815

## References

- [https://api.github.com/users/ZephrFish](https://api.github.com/users/ZephrFish)
- [https://github.com/ZephrFish](https://github.com/ZephrFish)
- [https://api.github.com/users/ZephrFish/gists%7B/gist_id%7D](https://api.github.com/users/ZephrFish/gists%7B/gist_id%7D)
- [https://api.github.com/users/ZephrFish/repos](https://api.github.com/users/ZephrFish/repos)
- [https://avatars.githubusercontent.com/u/5783068?v=4](https://avatars.githubusercontent.com/u/5783068?v=4)
- [https://api.github.com/users/ZephrFish/events%7B/privacy%7D](https://api.github.com/users/ZephrFish/events%7B/privacy%7D)

## Related threats

- [GO-2026-6222 - Excessive memory allocation during VP8L decoding in golang.org/x/image](https://junglewise.ai/threats/cve-2026-46603-go-2026-6222-excessive-memory-allocation-during-vp8l-decoding-in)
- [Go x/image/tiff denial of service via out-of-bounds strip offset](https://junglewise.ai/threats/cve-2026-46604-go-x-image-tiff-denial-of-service-via-out-of-bounds-strip-offset)
- [Go x/image/tiff unbounded memory consumption in TIFF decoder](https://junglewise.ai/threats/cve-2026-46602-go-x-image-tiff-unbounded-memory-consumption-in-tiff-decoder)
- [Go x/image/webp denial of service via mismatched VP8 dimensions](https://junglewise.ai/threats/cve-2026-46601-go-x-image-webp-denial-of-service-via-mismatched-vp8-dimensions)
- [Go x/image/tiff resource exhaustion in PackBits decompression](https://junglewise.ai/threats/cve-2026-46599-go-x-image-tiff-resource-exhaustion-in-packbits-decompression)