CVE-2025-13465: Prototype Pollution Vulnerability in Lodash _.unset and _.omit functions
Noroxi assessment
Priority: Monitor (action score 28/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 78.8% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: Lodash lodash 4.17.23; Lodash lodash-amd 4.17.23; Lodash lodash-es 4.17.23.
Low priority for now. Upgrade to Lodash lodash 4.17.23; Lodash lodash-amd 4.17.23; Lodash lodash-es 4.17.23 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
The _.unset and _.omit functions in Lodash are vulnerable to prototype pollution. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes. The issue permits deletion of properties but does not allow overwriting their original behavior. The issue is patched from 4.17.23 to 4.18.0 depending on the package: lodash, lodash-es, and lodash-amd in 4.17.23, and the standalone lodash.unset and lodash.omit packages in 4.18.0.
- BDU:2026-09405
- GHSA-f23m-r3pf-42rh
- GHSA-xxjr-mmjv-4gpg
- ALSA-2026:18480
- ALSA-2026:18868
- ALSA-2026:2438
- ALSA-2026:2452
- openSUSE-SU-2026:10124-1
- openSUSE-SU-2026:10147-1
- openSUSE-SU-2026:10148-1
- openSUSE-SU-2026:10149-1
- openSUSE-SU-2026:10150-1
- openSUSE-SU-2026:10154-1
- openSUSE-SU-2026:10155-1
- openSUSE-SU-2026:11126-1
- openSUSE-SU-2026:20177-1
- openSUSE-SU-2026:20181-1
- openSUSE-SU-2026:20182-1
- openSUSE-SU-2026:20185-1
- openSUSE-SU-2026:20244-1
- Published
- Jan 21, 2026
- Updated
- Oct 15, 2026
- EPSS
- 1.8% · 78th percentile
- CWE
- CWE-1321
Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 27 / 40 · 6.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · openjs
- 6.9
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:H/SI:H/SA:H/E:P
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- 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 |
|---|---|---|
| lodash | lodash | cpe:2.3:a:lodash:lodash |
Is the Lodash on your site affected?
The free JavaScript library scanner reads the Lodash version from the files your site loads, matches this record and other known vulnerabilities, and gives the safe version on the same branch. If the version can't be read, it says so. No account needed.
Scan JavaScript librariesAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- lodash lodash4.0.0 and later · before 4.17.23
Versions reported by the vendor
Affected version ranges reported by the assigning authority (openjs). Independent of NVD's CPE analysis and usually ahead of it.
Lodash lodash
- 4.17.23not affected
- 4.0.0 and later · before 4.17.23affected · semver
Lodash lodash-amd
- 4.17.23not affected
- 4.0.0 and later · before 4.17.23affected · semver
Lodash lodash-es
- 4.17.23not affected
- 4.0.0 and later · before 4.17.23affected · semver
Lodash lodash.omit
- 4.18.0not affected
- 4.0.0 and later · before 4.18.0affected · semver
Lodash lodash.unset
- 4.18.0not affected
- 4.0.0 and later · before 4.18.0affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | cockpit-ha-cluster | before 0.12.1-1.el10_1.2 | 0.12.1-1.el10_1.2 |
| AlmaLinux:10 | sgx-common | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:10 | sgx-libs | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:10 | sgx-mpa | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:10 | sgx-pccs | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:10 | sgx-pccs-admin | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:10 | sgx-pckid-tool | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:10 | tdx-qgs | before 2.26-7.el10 | 2.26-7.el10 |
| AlmaLinux:9 | pcs | before 0.11.10-1.el9_7.2 | 0.11.10-1.el9_7.2 |
| AlmaLinux:9 | pcs-snmp | before 0.11.10-1.el9_7.2 | 0.11.10-1.el9_7.2 |
| AlmaLinux:9 | sgx-common | before 2.26-7.el9 | 2.26-7.el9 |
| AlmaLinux:9 | sgx-libs | before 2.26-7.el9 | 2.26-7.el9 |
| AlmaLinux:9 | sgx-mpa | before 2.26-7.el9 | 2.26-7.el9 |
| AlmaLinux:9 | sgx-pccs | before 2.26-7.el9 | 2.26-7.el9 |
| AlmaLinux:9 | sgx-pccs-admin | before 2.26-7.el9 | 2.26-7.el9 |
| AlmaLinux:9 | sgx-pckid-tool | before 2.26-7.el9 | 2.26-7.el9 |
| AlmaLinux:9 | tdx-qgs | before 2.26-7.el9 | 2.26-7.el9 |
| Debian:12 | node-lodash | before 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1 | 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1 |
| Debian:13 | node-lodash | before 4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1 | 4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1 |
| Debian:14 | node-lodash | before 4.17.21+dfsg+~cs8.31.198.20210220-10 | 4.17.21+dfsg+~cs8.31.198.20210220-10 |
| npm | lodash | from 4.0.0 · before 4.17.23 | 4.17.23 |
| npm | lodash-amd | from 4.0.0 · before 4.17.23 | 4.17.23 |
| npm | lodash-es | from 4.0.0 · before 4.17.23 | 4.17.23 |
| npm | lodash.omit | from 4.0.0 · before 4.18.0 | 4.18.0 |
+96
Same product
lodash: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-4800lodash vulnerable to Code Injection via `_.template` imports key names40Plan
- CVE-2019-10744Versions of lodash lower than 4.17.12 are vulnerable to Prototype Pollution.38Monitor
- CVE-2021-23337Lodash versions prior to 4.17.21 are vulnerable to Command Injection via the template function.34Monitor
Published before and after this one in the same product
- ← EarlierCVE-2020-8203Jul 15, 2020 · Prototype pollution attack when using _.zipObjectDeep in lodash before 4.17.20.31Monitor
- ← EarlierCVE-2020-28500Feb 15, 2021 · Regular Expression Denial of Service (ReDoS)23Monitor
- Later →CVE-2026-2950Mar 31, 2026 · lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`21Monitor
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 |
|---|---|---|
| Lodash lodash | 4.17.23 | Vendor (CNA) |
| Lodash lodash-amd | 4.17.23 | Vendor (CNA) |
| Lodash lodash-es | 4.17.23 | Vendor (CNA) |
| Lodash lodash.omit | 4.18.0 | Vendor (CNA) |
| Lodash lodash.unset | 4.18.0 | Vendor (CNA) |
| almalinux:cockpit-ha-cluster | 0.12.1-1.el10_1.2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:pcs | 0.11.10-1.el9_7.2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:pcs-snmp | 0.11.10-1.el9_7.2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:sgx-common | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:sgx-libs | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:sgx-mpa | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:sgx-pccs | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:sgx-pccs-admin | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:sgx-pckid-tool | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tdx-qgs | 2.26-7.el10 · AlmaLinux:10 | Package registry (OSV) |
| debian:node-lodash | 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1 · Debian:12 | Package registry (OSV) |
| debian:node-lodash | 4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1 · Debian:13 | Package registry (OSV) |
| npm:lodash | 4.17.23 | Package registry (OSV) |
| npm:lodash-amd | 4.17.23 | Package registry (OSV) |
| npm:lodash-es | 4.17.23 | Package registry (OSV) |
| npm:lodash.omit | 4.18.0 | Package registry (OSV) |
| npm:lodash.unset | 4.18.0 | Package registry (OSV) |
| opensuse:cockpit-machines | 346-2.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:cockpit-packages | 4.1-2.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:dracut-saltboot | 1.1.0-150000.1.65.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:golang-github-boynux-squid_exporter | 1.13.0-150000.1.12.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:golang-github-lusitaniae-apache_exporter | 1.0.10-150000.1.26.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:golang-github-prometheus-alertmanager | 0.28.1-150100.4.31.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:golang-github-prometheus-node_exporter | 1.9.1-150100.3.38.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:golang-github-prometheus-prometheus | 3.5.0-150100.4.29.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
+31
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2026-03-10 |
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.
- Published
- First PoC+47 d
- TodayNov 5, 2026+288 d
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.
- Lukas Eulerfinder
- Jordan Harbandanalyst
- Michał Lipińskiremediation reviewer
- Ulises Gascónremediation developer
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-295069 days apartlodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`21Monitor
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).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
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 (19 more)Show less
- github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg
- access.redhat.com/errata/RHSA-2026:11414
- access.redhat.com/errata/RHSA-2026:13542
- access.redhat.com/errata/RHSA-2026:13548
- access.redhat.com/errata/RHSA-2026:13829
- access.redhat.com/errata/RHSA-2026:14774
- access.redhat.com/errata/RHSA-2026:14870
- access.redhat.com/errata/RHSA-2026:14871
- access.redhat.com/errata/RHSA-2026:15091
- access.redhat.com/errata/RHSA-2026:17469
- access.redhat.com/errata/RHSA-2026:1845
- access.redhat.com/errata/RHSA-2026:18480
- access.redhat.com/errata/RHSA-2026:18868
- access.redhat.com/errata/RHSA-2026:19712
- access.redhat.com/errata/RHSA-2026:20042
- access.redhat.com/errata/RHSA-2026:20088
- access.redhat.com/errata/RHSA-2026:2078
- access.redhat.com/errata/RHSA-2026:2119
- access.redhat.com/errata/RHSA-2026:2145
Vendor advisories and official records. Exploit/PoC links are deliberately left out.