CVE-2020-28852

Exp

In x/text in Go before v0.3.5, a "slice bounds out of range" panic occurs in language.ParseAcceptLanguage while processing a BCP 47 tag. (x/text/language is supposed to be able to parse an HTTP Accept-Language header.)

Published: 2021-01-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-28852 is rated Exploit Available (55.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.11%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-28852

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-28852

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.27% 0.11% -0.17%
2 2025-11-18 0.10% 0.27% +0.17%
3 2023-03-07 — 0.10% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-28852

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-28852

OS Trackers for CVE-2020-28852

vendor priority summary link
debian not yet assigned CVE-2020-28852 not yet assigned priority: Debian including 1 source packages (golang-golang-x-text), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-28852
redhat medium — https://access.redhat.com/security/cve/CVE-2020-28852
suse medium CVE-2020-28852 severity moderate: SUSE including 9 source package names (git-lfs-2.13.3-3.el8_6, go1.14, …), 29 product×package rows across 16 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (16 product lines)): Known Not Affected 22, Fixed 7. https://www.suse.com/security/cve/CVE-2020-28852/
ubuntu low CVE-2020-28852 low priority: Ubuntu including 3 source packages (golang-golang-x-text, golang-x-text, google-guest-agent), 48 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 22, DNE 14, released 4, ignored 3, needs-triage 3, needed 2. https://ubuntu.com/security/CVE-2020-28852

Affected software / configurations for CVE-2020-28852

Vendor Product Version Raw CPE
golang text < 0.3.5 cpe:2.3:a:golang:text:*:*:*:*:*:*:*:*

References for CVE-2020-28852

URL Tags
https://github.com/golang/go/issues/42536 Exploit Issue Tracking Third Party Advisory
https://security.netapp.com/advisory/ntap-20210212-0004/ Third Party Advisory
cvelogic Threat Intelligence