CVE-2022-26386: Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in <code>/tmp</code>, but this behavior w
Noroxi assessment
Priority: Monitor (action score 26/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.70% (FIRST EPSS); higher than 53.6% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: firefox (AlmaLinux:8) 91.7.0-3.el8_5.alma; thunderbird (AlmaLinux:8) 91.7.0-2.el8_5.alma, 91.7.0-2.el8_5.alma.plus; firefox-esr (Alpine:v3.15) 91.7.0-r0.
- Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to firefox (AlmaLinux:8) 91.7.0-3.el8_5.alma; thunderbird (AlmaLinux:8) 91.7.0-2.el8_5.alma, 91.7.0-2.el8_5.alma.plus; firefox-esr (Alpine:v3.15) 91.7.0-r0 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in <code>/tmp</code>, but this behavior was changed to download them to <code>/tmp</code> where they could be affected by other local users. This behavior was reverted to the original, user-specific directory. <br>*This bug only affects Firefox for macOS and Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.7 and Thunderbird < 91.7.
- BDU:2022-01459
- ALSA-2022:0818
- ALSA-2022:0845
- DLA-2942-1
- DLA-2961-1
- DSA-5097-1
- DSA-5106-1
- openSUSE-SU-2022:0821-1
- openSUSE-SU-2022:0906-1
- openSUSE-SU-2024:11909-1
- RHSA-2022:0815
- RHSA-2022:0816
- RHSA-2022:0817
- RHSA-2022:0818
- RHSA-2022:0824
- RHSA-2022:0843
- RHSA-2022:0845
- RHSA-2022:0847
- RHSA-2022:0850
- RHSA-2022:0853
- Published
- Dec 22, 2022
- Updated
- Jun 17, 2026
- EPSS
- 0.7% · 53th percentile
- CWE
- CWE-377
Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.7%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| mozilla | firefox esr | cpe:2.3:a:mozilla:firefox_esr |
| mozilla | thunderbird | cpe:2.3:a:mozilla:thunderbird |
| apple | macos | cpe:2.3:o:apple:macos |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- mozilla firefox esrbefore 91.7
- mozilla thunderbirdbefore 91.7
Versions reported by the vendor
Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.
Mozilla Firefox ESR
- unspecified and later · before 91.7affected
Mozilla Thunderbird
- unspecified and later · before 91.7affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | firefox | before 91.7.0-3.el8_5.alma | 91.7.0-3.el8_5.alma |
| AlmaLinux:8 | thunderbird | before 91.7.0-2.el8_5.alma | 91.7.0-2.el8_5.alma |
| AlmaLinux:8 | thunderbird | before 91.7.0-2.el8_5.alma.plus | 91.7.0-2.el8_5.alma.plus |
| Alpine:v3.15 | firefox-esr | before 91.7.0-r0 | 91.7.0-r0 |
| Alpine:v3.16 | thunderbird | before 91.7.0-r0 | 91.7.0-r0 |
| Debian:10 | firefox-esr | before 91.7.0esr-1~deb10u1 | 91.7.0esr-1~deb10u1 |
| Debian:10 | thunderbird | before 1:91.7.0-2~deb10u1 | 1:91.7.0-2~deb10u1 |
| Debian:11 | firefox-esr | before 91.7.0esr-1~deb11u1 | 91.7.0esr-1~deb11u1 |
| Debian:11 | thunderbird | before 1:91.7.0-2~deb11u1 | 1:91.7.0-2~deb11u1 |
| Debian:12 | firefox-esr | before 91.7.0esr-1 | 91.7.0esr-1 |
| Debian:12 | thunderbird | before 1:91.7.0-1 | 1:91.7.0-1 |
| Debian:9 | firefox-esr | before 91.7.0esr-1~deb9u1 | 91.7.0esr-1~deb9u1 |
| Debian:9 | thunderbird | before 1:91.7.0-2~deb9u1 | 1:91.7.0-2~deb9u1 |
| openSUSE:Leap 15.3 | MozillaFirefox | before 91.7.0-152.22.1 | 91.7.0-152.22.1 |
| openSUSE:Leap 15.3 | MozillaThunderbird | before 91.7.0-150200.8.62.7 | 91.7.0-150200.8.62.7 |
| openSUSE:Tumbleweed | MozillaThunderbird | before 91.7.0-1.1 | 91.7.0-1.1 |
| Red Hat:enterprise_linux:7::client | firefox | before 0:91.7.0-3.el7_9 | 0:91.7.0-3.el7_9 |
| Red Hat:enterprise_linux:7::client | firefox-debuginfo | before 0:91.7.0-3.el7_9 | 0:91.7.0-3.el7_9 |
| Red Hat:enterprise_linux:7::client | thunderbird | before 0:91.7.0-2.el7_9 | 0:91.7.0-2.el7_9 |
| Red Hat:enterprise_linux:7::client | thunderbird-debuginfo | before 0:91.7.0-2.el7_9 | 0:91.7.0-2.el7_9 |
| Red Hat:enterprise_linux:8::appstream | firefox | before 0:91.7.0-3.el8_5 | 0:91.7.0-3.el8_5 |
| Red Hat:enterprise_linux:8::appstream | firefox-debuginfo | before 0:91.7.0-3.el8_5 | 0:91.7.0-3.el8_5 |
| Red Hat:enterprise_linux:8::appstream | firefox-debugsource | before 0:91.7.0-3.el8_5 | 0:91.7.0-3.el8_5 |
| Red Hat:enterprise_linux:8::appstream | thunderbird | before 0:91.7.0-2.el8_5 | 0:91.7.0-2.el8_5 |
+27
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2022-47518Dec 18, 2022 · An issue was discovered in the Linux kernel before 6.0.11.31Monitor
- ← EarlierCVE-2022-47520Dec 18, 2022 · An issue was discovered in the Linux kernel before 6.0.11.28Monitor
- Later →CVE-2022-4662Dec 22, 2022 · A flaw incorrect access control in the Linux kernel USB core subsystem was found in the way user attaches usb device.22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:firefox | 91.7.0-3.el8_5.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:thunderbird | 91.7.0-2.el8_5.alma · AlmaLinux:8 | Package registry (OSV) |
| alpine:firefox-esr | 91.7.0-r0 · Alpine:v3.15 | Package registry (OSV) |
| alpine:thunderbird | 91.7.0-r0 · Alpine:v3.16 | Package registry (OSV) |
| debian:firefox-esr | 91.7.0esr-1 · Debian:12 | Package registry (OSV) |
| debian:thunderbird | 1:91.7.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:MozillaFirefox | 91.7.0-152.22.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:MozillaThunderbird | 91.7.0-150200.8.62.7 · openSUSE:Leap 15.3 | Package registry (OSV) |
| red hat:firefox | 0:91.7.0-3.el8_1 · Red Hat:rhel_e4s:8.1::appstream | Package registry (OSV) |
| red hat:firefox-debuginfo | 0:91.7.0-3.el8_1 · Red Hat:rhel_e4s:8.1::appstream | Package registry (OSV) |
| red hat:firefox-debugsource | 0:91.7.0-3.el8_1 · Red Hat:rhel_e4s:8.1::appstream | Package registry (OSV) |
| red hat:thunderbird | 0:91.7.0-2.el8_2 · Red Hat:rhel_eus:8.2::appstream | Package registry (OSV) |
| red hat:thunderbird-debuginfo | 0:91.7.0-2.el8_2 · Red Hat:rhel_eus:8.2::appstream | Package registry (OSV) |
| red hat:thunderbird-debugsource | 0:91.7.0-2.el8_2 · Red Hat:rhel_eus:8.2::appstream | Package registry (OSV) |
| rocky linux:firefox | 0:91.7.0-3.el8_5 · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:thunderbird | 0:91.7.0-2.el8_5 · Rocky Linux:8 | Package registry (OSV) |
| suse:MozillaFirefox | 91.7.0-150.24.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOS | Package registry (OSV) |
| suse:MozillaThunderbird | 91.7.0-150200.8.62.7 · SUSE:Linux Enterprise Module for Package Hub 15 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-22-0222 · Mar 15, 2022(RedHat Güvenlik Güncellemesi)
- TR-22-0217 · Mar 11, 2022(RedHat Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-377 · Insecure Temporary FileCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (1 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.