How severe is CVE-2026-20889?

CVE-2026-20889 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-20889 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20889?

CVE-2026-20889 affects Libraw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20889?

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-2026-20889 have an EU (EUVD) identifier?

Yes. CVE-2026-20889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19620.

When was CVE-2026-20889 published?

CVE-2026-20889 was published on 2026-04-07 and last updated on 2026-06-30.

CVE-2026-20889

CVE-2026-20889 is a critical-severity vulnerability in Libraw with a CVSS 3.x base score of 9.8. 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 9.8)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19620
Weakness: CWE-190
Affected product: Libraw
Published: 2026-04-07
Last modified: 2026-06-30

Description

A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

Frequently asked questions

What is CVE-2026-20889?: A heap-based buffer overflow vulnerability exists in the x3f_thumb_loader functionality of LibRaw Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
How severe is CVE-2026-20889?: CVE-2026-20889 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-20889 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20889?: CVE-2026-20889 affects Libraw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20889?: 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-2026-20889 have an EU (EUVD) identifier?: Yes. CVE-2026-20889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19620.
When was CVE-2026-20889 published?: CVE-2026-20889 was published on 2026-04-07 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:libraw:libraw:0.22.0:*:*:*:*:*:*:*

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