How severe is CVE-2026-25990?

CVE-2026-25990 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-25990 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25990?

CVE-2026-25990 affects Python Pillow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25990?

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

Does CVE-2026-25990 have an EU (EUVD) identifier?

Yes. CVE-2026-25990 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6218.

When was CVE-2026-25990 published?

CVE-2026-25990 was published on 2026-02-11 and last updated on 2026-07-01.

CVE-2026-25990

CVE-2026-25990 is a high-severity vulnerability in Python Pillow with a CVSS 3.x base score of 7.5. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.6
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6218
Weakness: CWE-787
Affected product: Python Pillow
Published: 2026-02-11
Last modified: 2026-07-01

Description

Pillow is a Python imaging library. From 10.3.0 to before 12.1.1, an out-of-bounds write may be triggered when loading a specially crafted PSD image. This vulnerability is fixed in 12.1.1.

Frequently asked questions

What is CVE-2026-25990?: Pillow is a Python imaging library. From 10.3.0 to before 12.1.1, an out-of-bounds write may be triggered when loading a specially crafted PSD image. This vulnerability is fixed in 12.1.1.
How severe is CVE-2026-25990?: CVE-2026-25990 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-25990 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25990?: CVE-2026-25990 affects Python Pillow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25990?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25990 have an EU (EUVD) identifier?: Yes. CVE-2026-25990 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6218.
When was CVE-2026-25990 published?: CVE-2026-25990 was published on 2026-02-11 and last updated on 2026-07-01.

References

Affected products (1)

cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

More vulnerabilities in Python Pillow

CVE-2014-3007 — Critical (CVSS 10.0): Python Image Library (PIL) 1.1.7 and earlier and Pillow 2.3 might allow remote attackers to execute arbitrary commands…
CVE-2022-30595 — Critical (CVSS 9.8): libImaging/TgaRleDecode.c in Pillow 9.1.0 has a heap buffer overflow in the processing of invalid TGA image files.
CVE-2022-22817 — Critical (CVSS 9.8): PIL.ImageMath.eval in Pillow before 9.0.0 allows evaluation of arbitrary expressions, such as ones that use the Python…
CVE-2021-34552 — Critical (CVSS 9.8): Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters…
CVE-2021-25289 — Critical (CVSS 9.8): An issue was discovered in Pillow before 8.1.1. TiffDecode has a heap-based buffer overflow when decoding crafted YCbCr…
CVE-2020-5312 — Critical (CVSS 9.8): libImaging/PcxDecode.c in Pillow before 6.2.2 has a PCX P mode buffer overflow.

All CVEs affecting Python Pillow →

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