CVE-2025-1936

HIGH

7.3

CVSS v3

Description

jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

CWE-158

How to fix

Remediation Available

firefoxDebian

Fixed in:136.0-1CVE-2025-1936

firefoxRed Hat / RHEL

Fixed in:0:128.8.0-1.el7_9RHSA-2025:2699

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

firefoxRocky

Fixed in:0:128.8.0-1.el7_9RHSA-2025:2699

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

firefox-debuginfoRed Hat / RHEL

Fixed in:0:128.8.0-1.el7_9RHSA-2025:2699

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

firefox-debuginfoRocky

Fixed in:0:128.8.0-1.el7_9RHSA-2025:2699

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

firefox-debugsourceRocky

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

firefox-debugsourceRed Hat / RHEL

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_10RHSA-2025:2452

Fixed in:0:128.8.0-1.el8_8RHSA-2025:2486

Fixed in:0:128.8.0-1.el8_2RHSA-2025:2708

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el8_4RHSA-2025:2484

Fixed in:0:128.8.0-1.el8_6RHSA-2025:2485

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_0RHSA-2025:2481

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

firefox-x11Red Hat / RHEL

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

firefox-x11Rocky

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_2RHSA-2025:2480

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

Fixed in:0:128.8.0-1.el9_5RHSA-2025:2359

Fixed in:0:128.8.0-1.el9_4RHSA-2025:2479

firefoxUbuntu

Fixed in:136.0+build3-0ubuntu0.20.04.1USN-7334-1

thunderbirdUbuntu

Fixed in:1:128.12.0+build1-0ubuntu0.22.04.1USN-7663-1

DeveloperEditionWindows application

Affected:136.0Fixed in:136.0Mozilla

Affected:128.8.0Fixed in:128.8.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:136.0Fixed in:136.0Mozilla

Affected:128.8.0Fixed in:128.8.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:129.0 136.0Fixed in:136.0Mozilla

Affected:128.8.0Fixed in:128.8.0Mozilla

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

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.43%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Vendor Advisory4

Other references2

Related Vulnerabilities

Other CWE-158 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-47812	Critical	10.0	95%	KEV	Fix
CVE-2009-1537	High	8.8	51%	KEV	-
CVE-2022-20812	Critical	9.0	1.8%	-	Fix
CVE-2020-14500	Critical	10.0	1.7%	-	-
CVE-2020-7928	Medium	6.5	1.4%	-	Fix
CVE-2022-20813	Critical	9.0	1.1%	-	Fix

Common questions

How do I fix CVE-2025-1936?

Published advisories record a fix for 14 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-2025-1936 being actively exploited?

Not that we know of. CVE-2025-1936 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.43% is the estimated probability that it will be exploited in the next 30 days. That is higher than 35% of all scored CVEs.

How severe is CVE-2025-1936?

CVE-2025-1936 has a CVSS v3 base score of 7.3, 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-2025-1936 affect?

Published advisories record a fix for firefox (Debian), firefox (Red Hat / RHEL), firefox (Rocky), firefox-debuginfo (Red Hat / RHEL), and 10 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2025-1936

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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 2026-04-13.