How severe is CVE-2026-33809?

CVE-2026-33809 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-33809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33809?

CVE-2026-33809 affects Golang Tiff. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33809?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33809 have an EU (EUVD) identifier?

Yes. CVE-2026-33809 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15960.

When was CVE-2026-33809 published?

CVE-2026-33809 was published on 2026-03-25 and last updated on 2026-06-17.

CVE-2026-33809

CVE-2026-33809 is a medium-severity vulnerability in Golang Tiff with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15960
Weakness: CWE-434
Affected product: Golang Tiff
Published: 2026-03-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-33809?: 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.
How severe is CVE-2026-33809?: CVE-2026-33809 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-33809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33809?: CVE-2026-33809 affects Golang Tiff. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33809 have an EU (EUVD) identifier?: Yes. CVE-2026-33809 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15960.
When was CVE-2026-33809 published?: CVE-2026-33809 was published on 2026-03-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:golang:tiff:*:*:*:*:*:go:*:*

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CVE-2026-46604 — High (CVSS 7.5): The TIFF decoder can panic when decoding an invalid image with an out-of-bounds strip offset.
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