WebOb provides objects for HTTP requests and responses. Prior to 1.8.11, Response._make_location_absolute() in src/webob/response.py checks a Location value for a URI scheme or leading double slash before urllib.parse.urljoin() strips leading C0 control characters and spaces. An attacker-controlled value such as a space followed by a protocol-relative or absolute URL can therefore bypass SCHEME_RE and startswith("//") checks and be normalized to an off-host redirect. Request.relative_url() and webob.exc._HTTPMove subclasses, including HTTPFound, are also affected because they use the same unsafe URL joining behavior or bypass the earlier normalization path. An unauthenticated attacker who can influence an application's redirect target can send users to an attacker-controlled host for phishing or OAuth and SSO token theft, but exploitation requires the user to follow the redirect. This issue is fixed in version 1.8.11.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - WebOb provides objects for HTTP requests and responses. Prior to 1.8.11,
    Response._make_location_absolute() in src/webob/response.py checks a Location value for a URI scheme or
    leading double slash before urllib.parse.urljoin() strips leading C0 control characters and spaces. An
    attacker-controlled value such as a space followed by a protocol-relative or absolute URL can therefore
    bypass SCHEME_RE and startswith("//") checks and be normalized to an off-host redirect.
    Request.relative_url() and webob.exc._HTTPMove subclasses, including HTTPFound, are also affected because
    they use the same unsafe URL joining behavior or bypass the earlier normalization path. An unauthenticated
    attacker who can influence an application's redirect target can send users to an attacker-controlled host
    for phishing or OAuth and SSO token theft, but exploitation requires the user to follow the redirect. This
    issue is fixed in version 1.8.11. (CVE-2026-54770)

The remote SUSE Linux SLES12 / SLES_SAP12 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:4351-1 advisory.

    - CVE-2026-54770: an unauthenticated attacker who can influence an application's redirect target can send     users to an       attacker-controlled host for phishing or OAuth and SSO token theft (bsc#1275917).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - WebOb provides objects for HTTP requests and responses. Prior to 1.8.11,     Response._make_location_absolute() in src/webob/response.py checks a Location value for a URI scheme or     leading double slash before urllib.parse.urljoin() strips leading C0 control characters and spaces. An     attacker-controlled value such as a space followed by a protocol-relative or absolute URL can therefore     bypass SCHEME_RE and startswith(//) checks and be normalized to an off-host redirect.
    Request.relative_url() and webob.exc._HTTPMove subclasses, including HTTPFound, are also affected because     they use the same unsafe URL joining behavior or bypass the earlier normalization path. An unauthenticated     attacker who can influence an application's redirect target can send users to an attacker-controlled host     for phishing or OAuth and SSO token theft, but exploitation requires the user to follow the redirect. This     issue is fixed in version 1.8.11. (CVE-2026-54770)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
458745	Echo: python-webob: security update to 1:1.8.10-0+deb13u1+e1webob: security update to 1.8.11	Tenable Cloud Security	Echo Local Security Checks	Local	medium
458745	Echo: python-webob: security update to 1:1.8.10-0+deb13u1+e1webob: security update to 1.8.11	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
350777	SUSE SLES12 Security Update : python-WebOb (SUSE-SU-2026:4351-1)	Nessus	SuSE Local Security Checks	Local	medium
338694	Linux Distros Unpatched Vulnerability : CVE-2026-54770	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-54770

medium

Tenable Plugins

medium

medium

medium

medium