CVE-2021-28026
CVE-2021-28026 is a high-severity vulnerability in Jpeg Jpeg-xl with a CVSS 3.x base score of 7.8. 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-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (64th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Jpeg Jpeg-xl
- Published:
- Last modified:
Description
jpeg-xl v0.3.2 is affected by a heap buffer overflow in /lib/jxl/coeff_order.cc ReadPermutation. When decoding a malicous jxl file using djxl, an attacker can trigger arbitrary code execution or a denial of service.
Frequently asked questions
- What is CVE-2021-28026?
- jpeg-xl v0.3.2 is affected by a heap buffer overflow in /lib/jxl/coeff_order.cc ReadPermutation. When decoding a malicous jxl file using djxl, an attacker can trigger arbitrary code execution or a denial of service.
- How severe is CVE-2021-28026?
- CVE-2021-28026 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-28026 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-28026?
- CVE-2021-28026 affects Jpeg Jpeg-xl. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-28026?
- 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.
- When was CVE-2021-28026 published?
- CVE-2021-28026 was published on 2021-03-05 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:jpeg:jpeg-xl:0.3.2:*:*:*:*:*:*:*
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