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Mallory
Medium

Denial of Service via crafted TIFF upload in Apache Answer

IdentifiersCVE-2026-33582CWE-434· Unrestricted Upload of File with…

CVE-2026-33582 is a vulnerability in Apache Answer affecting versions through 2.0.0. The issue is described as an unrestricted upload of a file with a dangerous type: a specially crafted TIFF image can be uploaded and, when processed by the application, trigger excessive memory allocation during image decoding. This uncontrolled resource consumption can terminate the Apache Answer server process. Based on the provided content, exploitation requires an authenticated user capable of uploading such an image.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an authenticated attacker to cause a denial-of-service condition. By uploading a crafted TIFF image that triggers excessive memory allocation during decoding, the attacker can force the Apache Answer server process to crash, making the service unavailable until it is restarted or otherwise recovers.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, reduce exposure by restricting or disabling TIFF uploads where feasible, enforcing strict server-side validation and content-type allowlisting for uploaded images, and applying resource limits or isolation controls to the image-processing path to reduce the likelihood and impact of memory exhaustion. The authoritative fix in the provided content is upgrading to 2.0.1.

Remediation

Patch, then assume compromise.

Upgrade Apache Answer to version 2.0.1 or later. The provided advisory states that version 2.0.1 fixes CVE-2026-33582.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Apache Software FoundationAnswerapplication

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What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

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Social activity2

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