Description
Impact
Prototype pollution vulnerability in merge(). If application code calls rollbar.configure() with untrusted input, prototype pollution is possible.
Patches
Fixed in 2.26.5 and 3.0.0-beta5.
Workarounds
Ensure that values passed to rollbar.configure() do not contain untrusted input.
References
Fixed in https://github.com/rollbar/rollbar.js/pull/1394 (2.26.x) and https://github.com/rollbar/rollbar.js/pull/1390 (3.x)
Basic information
- Type
- reviewed
- Severity
- medium
- Advisory on GitHub
- Open advisory ↗
- Repository advisory
- Open repository advisory ↗
- Source code
- Browse source ↗
- Published (advisory)
- 2025-10-23 20:31:30 UTC
- Updated
- 2025-10-24 19:28:47 UTC
- GitHub reviewed
- 2025-10-23 20:31:30 UTC
- NVD published
- 2025-10-23
EPSS Score
| Score |
Percentile |
|
0.05%
|
15.35% |
CVSS Scores
| Base score |
Version |
Severity |
Vector |
|
5.9
|
3.1 |
—
|
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Click to expand
- Attack vector (AV:N)
- Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
- Attack complexity (AC:H)
- Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
- Privileges required (PR:N)
- No account or special rights needed—anonymous or random user is enough.
- User interaction (UI:N)
- Nobody has to click “OK” or open a trap file; it can work without a victim helping.
- Scope (S:U)
- Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
- Confidentiality (C:N)
- Doesn’t really leak secrets in a meaningful way.
- Integrity (I:H)
- They could widely tamper with or forge data—trust in the data is badly hurt.
- Availability (A:N)
- Service keeps running; no real outage angle.
|
CWEs
| CWE id |
Name |
|
CWE-1321
|
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') |
Credits
-
waltjones
(remediation_developer)
-
brianr
(coordinator)
-
kiwi865
(finder)
Affected packages (2)
Vulnerable version ranges and first patched releases as published by GitHub.
| Ecosystem |
Package |
Vulnerable range |
First patched |
Vulnerable functions |
| npm |
rollbar |
<= 2.26.4 |
2.26.5 |
—
|
| npm |
rollbar |
>= 3.0.0-alpha1, <= 3.0.0-beta4 |
3.0.0-beta5 |
—
|
cvelogic
Threat Intelligence