CVE-2018-17847
golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a "panic: runtime error" (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a "panic: runtime error" (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.
- Record
CVE-2018-17847- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a "panic: runtime error" (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.
- Record
CVE-2018-17847- Updated
- 2026-11-02
EUVDEUVD-2022-2438 No score
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a "panic: runtime error" (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.
- Record
EUVD-2022-2438- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4r78-hx75-jjj2
golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a panic: runtime error (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.
- Record
GHSA-4r78-hx75-jjj2- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSVBELL-CVE-2018-17847
CVE-2018-17847 does not affect BellSoft software
- Record
BELL-CVE-2018-17847- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-4r78-hx75-jjj2
golang.org/x/net/html has Improper Restriction of Operations within the Bounds of a Memory Buffer
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <svg><template><desc><t><svg></template>, leading to a panic: runtime error (index out of range) in (*nodeStack).pop in node.go, called from (*parser).clearActiveFormattingElements, during an html.Parse call.
- Record
GHSA-4r78-hx75-jjj2- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSVGHSA-mv93-wvcp-7m7r
golang.org/x/net/html Improper Validation of Array Index vulnerability
The html package (aka x/net/html) through 2018-09-25 in Go mishandles <math><template><mn><b></template>, leading to a "panic: runtime error" (index out of range) in (*insertionModeStack).pop in node.go, called from inHeadIM, during an html.Parse call.
- Record
GHSA-mv93-wvcp-7m7r- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
OSVGO-2022-0197 No score
Panic when parsing certain inputs in golang.org/x/net/html
The Parse function can panic on some invalid inputs.
For example, the Parse function panics on the input "<svg><template><desc><t><svg></template>".
- Record
GO-2022-0197- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
golang.org/x/netGo |
before 0.0.0-20190125002852-4b62a64f59f7 | 0.0.0-20190125002852-4b62a64f59f7 |
golang.org/x/netGo From an advisory covering 2 CVEs |
before 0.0.0-20190125002852-4b62a64f59f7 | 0.0.0-20190125002852-4b62a64f59f7 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-17847 is a high vulnerability (CVSS 7.5) in Golang Net, published October 1, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.36%, the 83rd percentile. Fixed in golang.org/x/net 0.0.0-20190125002852-4b62a64f59f7.
References
github.com/golang/go/issues/27846
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LREEWY6KNLHRWFZ7OT4HVLMVVCGGUHON
nvd.nist.gov/vuln/detail/CVE-2018-17847
go.dev/cl/159397
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go.googlesource.com/net/+/4b62a64f59f73840b9ab79204c94fee61cd1ba2c
pkg.go.dev/vuln/GO-2022-0197
docs.bell-sw.com/security/cves/CVE-2018-17847