VulnerabilityPublished 24 Sep 2026Updated 6 Oct 2026

CVE-2026-97149: OpenStack Swift · Incomplete List of Disallowed Inputs

Affects OpenStack SwiftSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium · fixed in 2.38.2 : update OpenStack Swift when convenient.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.38.2, 2.37.4, 2.36.4 +1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-ppc2-wr9h-8mxg

What to do

Upgrade OpenStack Swift to 2.38.2, 2.37.4, 2.36.4 or 2.35.5.

Affected software

Product	Affected	Fixed in
OpenStackSwift	Affected >=2.38.0 <2.38.2	Fixed in 2.38.2
OpenStackSwift	Affected >=2.37.0 <2.37.4	Fixed in 2.37.4
OpenStackSwift	Affected >=2.36.0 <2.36.4	Fixed in 2.36.4
OpenStackSwift	Affected >=2.4.0 <2.35.5	Fixed in 2.35.5

AI-suggested

A fix is available in OpenStack Swift version 2.38.2 and later. Users should upgrade to version 2.38.2 or newer to address this vulnerability. Until upgraded, deployments should consider restricting the use of account-level TempURL keys or modifying the proxy pipeline to reject the X-Copy-From header on PUT requests. Patch status is confirmed by the vendor advisory indicating the fix in 2.38.2.

Description

CVE-2026-97149 is a medium severity vulnerability in OpenStack Swift before version 2.38.2. The tempurl middleware does not reject the X-Copy-From header on PUT requests, allowing an attacker with a valid PUT TempURL to copy any object within the same account. This occurs because the TempURL signature does not cover the X-Copy-From header, and the disallowed headers list is incomplete. The vulnerability affects deployments using the default proxy pipeline with account-level TempURL keys. Cross-account copying is not possible, limiting the scope to the same account.

Impact

An attacker with a valid PUT TempURL for an object can read data from any other object within the same account by exploiting the incomplete disallowed headers list. This can lead to unauthorized data disclosure within the same account. The vulnerability does not allow cross-account data access. The CVSS 4.0 base score is 5.3, indicating medium severity with network attack vector, low complexity, and no privileges required beyond those needed to obtain the PUT TempURL.

CWE-184Incomplete List of Disallowed Inputs (opens in a new tab)
Base weaknessOWASP Top 10 A03:2021: Injection (opens in a new tab)
The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.
Implementation · Input Validation
Do not rely exclusively on detecting disallowed inputs. There are too many variants to encode a character, especially when different environments are used, so there is a high likelihood of missing some variants. Only use detection of disallowed inputs as a mechanism for detecting suspicious activity.
Attack patterns
Double Encoding (opens in a new tab)
Command Delimiters (opens in a new tab)
Flash Injection (opens in a new tab)
Using Leading 'Ghost' Character Sequences to Bypass Input Filters (opens in a new tab)
Exploiting Multiple Input Interpretation Layers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Oct 2026, 22:55 UTC

WeaknessesCWE-184

Technical details

References

Community reviews

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