How severe is CVE-2026-27809?

CVE-2026-27809 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-27809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27809?

CVE-2026-27809 affects Psd-tools Project Psd-tools. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27809?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-27809 have an EU (EUVD) identifier?

Yes. CVE-2026-27809 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8781.

When was CVE-2026-27809 published?

CVE-2026-27809 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27809

CVE-2026-27809 is a critical-severity vulnerability in Psd-tools Project Psd-tools with a CVSS 3.x base score of 9.1. 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-190.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 6.8
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8781
Weakness: CWE-190
Affected product: Psd-tools Project Psd-tools
Published: 2026-02-26
Last modified: 2026-06-17

Description

psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.12.2, when a PSD file contains malformed RLE-compressed image data (e.g. a literal run that extends past the expected row size), decode_rle() raises ValueError which propagated all the way to the user, crashing psd.composite() and psd-tools export. decompress() already had a fallback that replaces failed channels with black pixels when result is None, but it never triggered because the ValueError from decode_rle() was not caught. The fix in version 1.12.2 wraps the decode_rle() call in a try/except so the existing fallback handles the error gracefully.

Frequently asked questions

What is CVE-2026-27809?: psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.12.2, when a PSD file contains malformed RLE-compressed image data (e.g. a literal run that extends past the expected row size), decode_rle() raises ValueError which propagated all the way to the user, crashing psd.composite() and psd-tools export. decompress() already had a fallback that replaces failed channels with black pixels when result is None, but it never triggered because the ValueError from decode_rle() was not caught. The fix in version 1.12.2 wraps the decode_rle() call in a try/except so the existing fallback handles the error gracefully.
How severe is CVE-2026-27809?: CVE-2026-27809 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-27809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27809?: CVE-2026-27809 affects Psd-tools Project Psd-tools. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-27809 have an EU (EUVD) identifier?: Yes. CVE-2026-27809 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8781.
When was CVE-2026-27809 published?: CVE-2026-27809 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:psd-tools_project:psd-tools:*:*:*:*:*:*:*:*

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