azure-storage-blob-batch: Improper Neutralization of Special Elements in Output Used by a Downstream Component
CVE-2026-88094 is a high-severity improper neutralization of special elements in output used by a downstream component vulnerability in azure-storage-blob-batch from Microsoft, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 12.31.2 as the first without the flaw, so updating azure-storage-blob-batch to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.82% chance of exploitation within 30 days, higher than 58% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update azure-storage-blob-batch to 12.31.2 or a later version.
- Update Microsoft Edge (Chromium-based) to 153.0.4234.46 or a later version.
- Update Edge Chromium to 153.0.4234.46 or a later version.
- Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Microsoft | azure-storage-blob-batch | 1.0.0 up to, but not including, 12.31.2 | 12.31.2 |
| Microsoft | Microsoft Edge (Chromium-based) | 1.0.0.0 up to, but not including, 153.0.4234.46 | 153.0.4234.46 |
| Microsoft | Edge Chromium | before 153.0.4234.46 | 153.0.4234.46 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H. Scored by CNA (microsoft.com).
Official description
Improper neutralization of special elements in output used by a downstream component ('injection') in Azure Storage Library allows an authorized attacker to elevate privileges over a network.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements in Output Used by a Downstream Component
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
How developers prevent this class of flaw
- Programming languages and supporting technologies might be chosen which are not subject to these issues.
- Utilize an appropriate mix of allowlist and denylist parsing to filter control-plane syntax from all input.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Recent Improper Neutralization of Special Elements in Output Used by a Downstream Component vulnerabilities
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- 7.3 High severity
- 7.3 High severity
- 7.3 High severity
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