6.5

CVE-2026-2950: lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`

Published
AliasesUBUNTU-CVE-2026-2950DEBIAN-CVE-2026-2950CGA-22xq-whw5-fh8q
Published 31-03-2026Last modified 01-04-2026

Vulnerability summary

CVE-2026-2950 is a medium (CVSS 6.5) vulnerability in lodash. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 27.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.34%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 2
CVE-2021-23337RHBA-2026:21388RHSA-2026:7378RHSA-2026:7655RHSA-2026:9455USN-8411-1

Timeline

  1. 31-03-2026
    PublishedVulnerability first disclosed.
  2. 01-04-2026
    Last modifiedVulnerability information updated.

Description

Impact: Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for (CVE-2025-13465: https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg) only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype. The issue permits deletion of prototype properties but does not allow overwriting their original behavior. Patches: This issue is patched in 4.18.0. Workarounds: None. Upgrade to the patched version.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.38% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard36 products
  • argo-workflows-ui-3.7< 3.7.13-r0
  • argo-workflows-ui-4.0< 4.0.4-r0
  • code-server< 4.112.0-r2
  • jitsucom-jitsu-console< 2.11.0-r19
  • json-server< 0.17.4-r6
Wolfi36 products
  • argo-workflows-ui-3.7< 3.7.13-r0
  • argo-workflows-ui-4.0< 4.0.4-r0
  • code-server< 4.112.0-r2
  • jitsucom-jitsu-console< 2.11.0-r19
  • json-server< 0.17.4-r6
Lodash4 products
Debian1 product
  • node-lodash< 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1 | < 4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1 | < 4.18.1+dfsg-1
Ubuntu1 product
  • node-lodash< 2.4.1+dfsg-3ubuntu0.1~esm1 | < 4.17.4+dfsg-1ubuntu0.1~esm1 | < 4.17.15+dfsg-2ubuntu0.1~esm1 | < 4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1 | < 4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1 | < 4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1 | < 4.17.23+dfsg-1ubuntu0.1~esm1

5 vendors · 78 products

References

7 links