Directory traversal vulnerability in soup-uri.c in SoupServer in libsoup before 2.35.4 allows remote attackers to read arbitrary files via a
Directory traversal vulnerability in soup-uri.c in SoupServer in libsoup before 2.35.4 allows remote attackers to read arbitrary files via a %2e%2e (encoded dot dot) in a URI.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Aug 31, 2011
- Updated
- Jun 16, 2026
- EPSS
- 1.9% · 79th percentile
- CWE
- CWE-22
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Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.9%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| gnome | libsoup | cpe:2.3:a:gnome:libsoup |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- gnome libsoupup to 2.35.3 inclusive
- gnome libsoup2.0
- gnome libsoup2.2
- gnome libsoup2.2.0
- gnome libsoup2.2.1
- gnome libsoup2.2.100
- gnome libsoup2.2.101
- gnome libsoup2.2.102
- gnome libsoup2.2.103
- gnome libsoup2.2.104
- gnome libsoup2.2.2
- gnome libsoup2.2.3
- gnome libsoup2.2.4
- gnome libsoup2.2.5
- gnome libsoup2.2.6
- gnome libsoup2.2.6.1
- gnome libsoup2.2.7
- gnome libsoup2.2.91
- gnome libsoup2.2.92
- gnome libsoup2.2.93
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | libsoup2.4 | before 2.34.3-1 | 2.34.3-1 |
| Debian:5.0 | libsoup2.4 | before 2.4.1-2+lenny1 | 2.4.1-2+lenny1 |
| Debian:6.0 | libsoup2.4 | before 2.30.2-1+squeeze1 | 2.30.2-1+squeeze1 |
| Red Hat:enterprise_linux:6::server | libsoup | before 0:2.28.2-1.el6_1.1 | 0:2.28.2-1.el6_1.1 |
| Red Hat:enterprise_linux:6::server | libsoup-debuginfo | before 0:2.28.2-1.el6_1.1 | 0:2.28.2-1.el6_1.1 |
| Red Hat:enterprise_linux:6::server | libsoup-devel | before 0:2.28.2-1.el6_1.1 | 0:2.28.2-1.el6_1.1 |
Same product
gnome: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-2885An exploitable stack based buffer overflow vulnerability exists in the GNOME libsoup 2.58.46Plan
- CVE-2019-17266libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup_ntlm_parse_challenge() in soup-auth-ntlm.c does no40Plan
- CVE-2018-12910The get_cookies function in soup-cookie-jar.c in libsoup 2.63.2 allows attackers to have unspecified impact via an empty hostname.40Plan
- CVE-2026-2369Libsoup: libsoup: buffer overread due to integer underflow when handling zero-length resources36Monitor
- CVE-2026-5119Libsoup: libsoup: information disclosure via cleartext transmission of cookies during https tunnel establishment32Monitor
- CVE-2026-2436Libsoup: libsoup: denial of service via use-after-free in soupserver during tls handshake32Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:libsoup2.4 | 2.34.3-1 · Debian:12 | Package registry (OSV) |
| red hat:libsoup | 0:2.28.2-1.el6_1.1 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:libsoup-debuginfo | 0:2.28.2-1.el6_1.1 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:libsoup-devel | 0:2.28.2-1.el6_1.1 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- P · data can be read
- Integrity
- none
- Availability
- none
- Attack complexity
- Low
- Confidentiality impact
- P
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
nvd-primary
Root cause
A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.
The bug in code
The whole CWE-22 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
const file = path.join(ROOT, req.query.name);res.sendFile(file);Fixed
const file = path.resolve(ROOT, req.query.name);if (!file.startsWith(ROOT + path.sep)) { return res.sendStatus(400);}res.sendFile(file);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Path TraversalCAPEC-126likelihood: High · Very High
- Using Slashes and URL Encoding Combined to Bypass Validation LogicCAPEC-64likelihood: High · High
- Manipulating Web Input to File System CallsCAPEC-76likelihood: High · Very High
- Using Escaped Slashes in Alternate EncodingCAPEC-78likelihood: High · High
- Using Slashes in Alternate EncodingCAPEC-79likelihood: High · High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.gnome.org/browse/libsoup/tree/NEWS
- lists.fedoraproject.org/pipermail/package-announce/2011-August/063431.html
- secunia.com/advisories/47299
- www.debian.org/security/2011/dsa-2369
- www.redhat.com/support/errata/RHSA-2011-1102.html
- www.securitytracker.com/id?1025864
- www.ubuntu.com/usn/USN-1181-1
- bugzilla.gnome.org/show_bug.cgi?id=653258
Vendor advisories and official records. Exploit/PoC links are deliberately left out.