# CVE-2026-33582: Apache Answer denial of service via crafted TIFF upload

Source: https://junglewise.ai/threats/cve-2026-33582-apache-answer-denial-of-service-via-crafted-tiff-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-07-31  
License: CC BY 4.0 with a link back

CVE-2026-33582 · Severity: medium · CVSS 6.5 · Published 2026-06-09

Apache Answer, a Q&A platform software, is vulnerable to a denial-of-service attack. An authenticated user can upload a specially crafted image file that causes the server to consume excessive memory and crash. This can lead to service outages and prevent legitimate users from accessing the platform.

Technologies: [Apache Software Foundation Answer](https://junglewise.ai/threats/technologies/answer), [github.com/apache/answer (Go)](https://junglewise.ai/threats/technologies/github-com-apache-answer), [github.com/apache/incubator-answer (Go)](https://junglewise.ai/threats/technologies/github-com-apache-incubator-answer). Vendors: [Apache Software Foundation](https://junglewise.ai/threats/vendors/apache-software-foundation), [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-33582 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33582 being exploited in the wild.

**How severe is CVE-2026-33582?** Medium severity, with a CVSS score of 6.5, published 9 June 2026.

**Which products and versions are affected?** Apache Software Foundation Answer through 2.0.0; github.com/apache/answer (Go) SEMVER:introduced=0,fixed=1.7.2-0.20260325113131-cfc3e54f30cc; github.com/apache/incubator-answer (Go) < 1.7.2-0.20260325113131-cfc3e54f30cc, SEMVER:introduced=0,fixed=1.7.2-0.20260325113131-cfc3e54f30cc.

**Is there a fix for CVE-2026-33582?** Yes. github.com/apache/answer (Go): upgrade to 1.7.2-0.20260325113131-cfc3e54f30cc or later; github.com/apache/incubator-answer (Go): upgrade to 1.7.2-0.20260325113131-cfc3e54f30cc or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-33582 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-33582?** Check whether you run Apache Software Foundation Answer, github.com/apache/answer (Go) or github.com/apache/incubator-answer (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

- github.com/apache/answer (Go): upgrade to 1.7.2-0.20260325113131-cfc3e54f30cc or later

  ```sh
  go get github.com/apache/answer@v1.7.2-0.20260325113131-cfc3e54f30cc
  ```

- github.com/apache/incubator-answer (Go): upgrade to 1.7.2-0.20260325113131-cfc3e54f30cc or later

  ```sh
  go get github.com/apache/incubator-answer@v1.7.2-0.20260325113131-cfc3e54f30cc
  ```


## Technical details

An unrestricted upload vulnerability (CWE-434) exists in Apache Answer through version 2.0.0. The application fails to properly validate or restrict the processing of certain image formats during decoding. An authenticated attacker can upload a maliciously crafted TIFF image that triggers excessive memory allocation during the decoding process, leading to an Out-of-Memory (OOM) condition and a crash of the server process. The fix, introduced in version 2.0.1, involves enhancing image decoding by implementing format-specific checks for safer types like JPEG, PNG, and GIF.

## Affected products

- Apache Answer through 2.0.0

## Identifiers

- CVE-2026-33582
- GHSA-v553-g2w6-295p
- GO-2026-6153

## Timeline

- 2026-05-29: patched: Version 2.0.1 released
- 2026-06-09: disclosed: Public advisory published

## References

- [https://lists.apache.org/thread/3sgpx4cwsgpnt66xv3cqvtc8z4st1kbq](https://lists.apache.org/thread/3sgpx4cwsgpnt66xv3cqvtc8z4st1kbq)
- [http://www.openwall.com/lists/oss-security/2026/06/09/5](http://www.openwall.com/lists/oss-security/2026/06/09/5)
- [https://github.com/apache/answer/commit/cfc3e54f30cc5e01afb7110ecc1da9152d0a3a41](https://github.com/apache/answer/commit/cfc3e54f30cc5e01afb7110ecc1da9152d0a3a41)
- [https://github.com/apache/answer/releases/tag/v2.0.1](https://github.com/apache/answer/releases/tag/v2.0.1)

## Related threats

- [Apache Answer improper security token invalidation for administrative accounts](https://junglewise.ai/threats/cve-2026-25700-apache-answer-improper-security-token-invalidation-for)
- [Apache Answer information disclosure in unlisted questions feature](https://junglewise.ai/threats/cve-2026-34905-apache-answer-information-disclosure-in-unlisted-questions)
- [Apache Answer XSS in notification emails](https://junglewise.ai/threats/cve-2026-34033-apache-answer-xss-in-notification-emails)
- [Apache Answer unrestricted upload in profile image URLs](https://junglewise.ai/threats/cve-2026-34031-apache-answer-unrestricted-upload-in-profile-image-urls)
- [Apache Answer information disclosure in timeline APIs](https://junglewise.ai/threats/cve-2026-25699-apache-answer-information-disclosure-in-timeline-apis)