CVE & CISA-KEV Catalog

CVE-2026-1837

HIGH
7.5
CVSS v3
NVD

Description

A specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninitialized unallocated region is copied to pixel data. This can be done by requesting color transformation of grayscale images to another grayscale color space. Buffers allocated for 1-float-per-pixel are used as if they are allocated for 3-float-per-pixel. That happens only if LCMS2 is used as CMS engine. There is another CMS engine available (selected by build flags).

CWE-805CWE-770Allocation of Resources Without Limits or ThrottlingCWE-787Out-of-bounds Write

How to fix

Remediation Available
firefoxAmazon
Fixed in:0:140.7.1-1.amzn2023.0.1
Fixed in:0:140.7.1-1.amzn2023.0.1
firefox-debuginfoAmazon
Fixed in:0:140.7.1-1.amzn2023.0.1
Fixed in:0:140.7.1-1.amzn2023.0.1
firefox-debugsourceAmazon
Fixed in:0:140.7.1-1.amzn2023.0.1
Fixed in:0:140.7.1-1.amzn2023.0.1
jpegxl-debuginfoAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
jpegxl-debugsourceAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
jpegxl-docAmazon
Fixed in:1:0.10.3-55.amzn2023
jxl-pixbuf-loaderAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
jxl-pixbuf-loader-debuginfoAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxlAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxl-debuginfoAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxl-develAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxl-devtoolsAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxl-devtools-debuginfoAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxl-utilsAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
libjxl-utils-debuginfoAmazon
Fixed in:1:0.10.3-55.amzn2023
Fixed in:1:0.10.3-55.amzn2023
thunderbirdAmazon
Fixed in:0:140.7.2-1.amzn2.0.1
Fixed in:0:140.7.2-1.amzn2.0.1
iOSApple
Fixed in:26.5127110
macOS TahoeApple
Fixed in:26.5127115
tvOSApple
Fixed in:26.5127118
visionOSApple
Fixed in:26.5127120
watchOSApple
Fixed in:26.5127119
jpeg-xlDebian
Fixed in:0.11.2-0.1~deb13u1CVE-2026-1837
Fixed in:0.11.2-0.1CVE-2026-1837
jpeg-xlUbuntu
Fixed in:0.11.1-6ubuntu1.1USN-8146-1
libjpegxl-javaUbuntu
Fixed in:0.11.1-6ubuntu1.1USN-8146-1
libjxl-toolsUbuntu
Fixed in:0.11.1-6ubuntu1.1USN-8146-1
libjxl0.11Ubuntu
Fixed in:0.11.1-6ubuntu1.1USN-8146-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.29%probability of exploitation in 30 days
21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Related Vulnerabilities

Other CWE-805 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2020-14509Critical9.82.1%-Fix
CVE-2025-23319High8.11.6%-Fix
CVE-2024-24851High7.51.4%--
CVE-2021-31885High7.51.2%-Fix
CVE-2023-20049High8.61.0%-Fix
CVE-2020-16101High7.51.0%-Fix

Common questions

How do I fix CVE-2026-1837?

Published advisories record a fix for 26 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-1837 being actively exploited?

Not that we know of. CVE-2026-1837 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.29% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.

How severe is CVE-2026-1837?

CVE-2026-1837 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-1837 affect?

Published advisories record a fix for firefox (Amazon), firefox-debuginfo (Amazon), firefox-debugsource (Amazon), jpegxl-debuginfo (Amazon), and 22 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-15.